This program unpacks Playstation 3 Theme files (.p3t) so that you can touch-up an existing theme to your likings or use a certain wallpaper from it (as many themes have multiple). But remember, if you use content from another theme and release it, be sure to give credit!
Download p3textractor.zip from above. Extract the files to a folder with a program such as WinZip or WinRAR. Now there are multiple ways to extract the theme.
The first way is to simply open the p3t file with p3textractor.exe. If you don’t know how to do this, right click the p3t file and select Open With. Alternatively, open the p3t file and it will ask you to select a program to open with. Click Browse and find p3textractor.exe from where you previously extracted it to. It will open CMD and extract the theme to extracted.[filename]. After that, all you need to do for any future p3t files is open them and it will extract.
The second way is very simple. Just drag the p3t file to p3textractor.exe. It will open CMD and extract the theme to extracted.[filename].
For the third way, first put the p3t file you want to extract into the same folder as p3textractor.exe. Open CMD and browse to the folder with p3extractor.exe. Enter the following: p3textractor filename.p3t [destination path]Replace filename with the name of the p3t file, and replace [destination path] with the name of the folder you want the files to be extracted to. A destination path is not required. By default it will extract to extracted.filename.
Final Fantasy is mostly an anthology series with primary installments being stand-alone role-playing games, each with different settings, plots and main characters, but the franchise is linked by several recurring elements, including game mechanics and recurring character names. Each plot centers on a particular group of heroes who are battling a great evil, but also explores the characters' internal struggles and relationships. Character names are frequently derived from the history, languages, pop culture, and mythologies of cultures worldwide. The mechanics of each game involve similar battle systems and maps.
Final Fantasy has been both critically and commercially successful. Several entries are regarded as some of the greatest video games, with the series selling more than 185 million copies worldwide, making it one of the best-selling video game franchises of all time. The series is well known for its innovation, visuals, such as the inclusion of full-motion videos, photorealistic character models, and music by Nobuo Uematsu. It has popularized many features now common in role-playing games, also popularizing the genre as a whole in markets outside Japan.
The first installment of the series was released in Japan on December 18, 1987. Subsequent games are numbered and given a story unrelated to previous games, so the numbers refer to volumes rather than to sequels. Many Final Fantasy games have been localized for markets in North America, Europe, and Australia on numerous video game consoles, personal computers (PC), and mobile phones. As of June 2023, the series includes the main installments from Final Fantasy to Final Fantasy XVI, as well as direct sequels and spin-offs, both released and confirmed as being in development. Most of the older games have been remade or re-released on multiple platforms.[1]
Three Final Fantasy installments were released on the Nintendo Entertainment System (NES). Final Fantasy was released in Japan in 1987 and in North America in 1990.[2][3] It introduced many concepts to the console RPG genre, and has since been remade on several platforms.[3]Final Fantasy II, released in 1988 in Japan, has been bundled with Final Fantasy in several re-releases.[3][4][5] The last of the NES installments, Final Fantasy III, was released in Japan in 1990,[6] but was not released elsewhere until a Nintendo DSremake came out in 2006.[5]
The PlayStation console saw the release of three main Final Fantasy games. Final Fantasy VII (1997) moved away from the two-dimensional (2D) graphics used in the first six games to three-dimensional (3D) computer graphics; the game features polygonal characters on pre-rendered backgrounds. It also introduced a more modern setting, a style that was carried over to the next game.[3] It was also the second in the series to be released in Europe, with the first being Final Fantasy Mystic Quest. Final Fantasy VIII was published in 1999, and was the first to consistently use realistically proportioned characters and feature a vocal piece as its theme music.[3][13]Final Fantasy IX, released in 2000, returned to the series' roots, by revisiting a more traditional Final Fantasy setting, rather than the more modern worlds of VII and VIII.[3][14]
Three main installments, as well as one online game, were published for the PlayStation 2.[15][16][17]Final Fantasy X (2001) introduced full 3D areas and voice acting to the series, and was the first to spawn a sub-sequel (Final Fantasy X-2, published in 2003).[18][19] The first massively multiplayer online role-playing game (MMORPG) in the series, Final Fantasy XI, was released on the PS2 and PC in 2002, and later on the Xbox 360.[20][21] It introduced real-time battles instead of random encounters.[21]Final Fantasy XII, published in 2006, also includes real-time battles in large, interconnected playfields.[22][23] The game is also the first in the main series to utilize a world used in a previous game, namely the land of Ivalice, which was previously featured in Final Fantasy Tactics and Vagrant Story.[24]
In 2009, Final Fantasy XIII was released in Japan, and in North America and Europe the following year, for PlayStation 3 and Xbox 360.[25][26] It is the flagship installment of the Fabula Nova Crystallis Final Fantasy series[27] and became the first mainline game to spawn two sub-sequels (XIII-2 and Lightning Returns).[28] It was also the first game released in Chinese and high definition along with being released on two consoles at once. Final Fantasy XIV, a MMORPG, was released worldwide on Microsoft Windows in 2010, but it received heavy criticism when it was launched, prompting Square Enix to rerelease the game as Final Fantasy XIV: A Realm Reborn, this time to the PlayStation 3 as well, in 2013.[29]Final Fantasy XV is an action role-playing game that was released for PlayStation 4 and Xbox One in 2016.[30][31] Originally a XIII spin-off titled Versus XIII, XV uses the mythos of the Fabula Nova Crystallis series, although in many other respects the game stands on its own and has since been distanced from the series by its developers.[38] The sixteenth mainline entry, Final Fantasy XVI,[39] was released in 2023 for PlayStation 5.[40]
Square Enix has expanded the Final Fantasy series into various media. Multiple anime and computer-generated imagery (CGI) films have been produced that are based either on individual Final Fantasy games or on the series as a whole. The first was an original video animation (OVA), Final Fantasy: Legend of the Crystals, a sequel to Final Fantasy V. The story was set in the same world as the game, although 200 years in the future. It was released as four 30-minute episodes, first in Japan in 1994 and later in the United States by Urban Vision in 1998. In 2001, Square Pictures released its first feature film, Final Fantasy: The Spirits Within. The film is set on a future Earth invaded by alien life forms.[57]The Spirits Within was the first animated feature to seriously attempt to portray photorealistic CGI humans, but was considered a box office bomb and garnered mixed reviews.[57][58][59]
A 25-episode anime television series, Final Fantasy: Unlimited, was released in 2001 based on the common elements of the Final Fantasy series. It was broadcast in Japan by TV Tokyo and released in North America by ADV Films.
In 2005, Final Fantasy VII: Advent Children, a feature length direct-to-DVD CGI film, and Last Order: Final Fantasy VII, a non-canon OVA,[60] were released as part of the Compilation of Final Fantasy VII. Advent Children was animated by Visual Works, which helped the company create CG sequences for the games.[61] The film, unlike The Spirits Within, became a commercial success.[62][63][64][65]Last Order, on the other hand, was released in Japan in a special DVD bundle package with Advent Children. Last Order sold out quickly[66] and was positively received by Western critics,[67][68] though fan reaction was mixed over changes to established story scenes.[69]
Two animated tie-ins for Final Fantasy XV were released as part of a larger multimedia project dubbed the Final Fantasy XV Universe. Brotherhood is a series of five 10-to-20-minute-long episodes developed by A-1 Pictures and Square Enix detailing the backstories of the main cast. Kingsglaive, a CGI film released prior to the game in Summer 2016, is set during the game's opening and follows new and secondary characters.[70][71][72][73] In 2019, Square Enix released a short anime, produced by Satelight Inc, called Final Fantasy XV: Episode Ardyn – Prologue on their YouTube channel which acts as the background story for the final piece of DLC for Final Fantasy XV giving insight into Ardyn's past.
Square Enix also released Final Fantasy XIV: Dad of Light in 2017, an 8-episode Japanese soap opera based, featuring a mix of live-action scenes and Final Fantasy XIV gameplay footage.
As of June 2019, Sony Pictures Television is working on a live-action adaptation of the series with Hivemind and Square Enix. Jason F. Brown, Sean Daniel and Dinesh Shamdasani for Hivemind are the producers while Ben Lustig and Jake Thornton were attached as writers and executive producers for the series.[74]
Several video games have either been adapted into or have had spin-offs in the form of manga and novels. The first was the novelization of Final Fantasy II in 1989, and was followed by a manga adaptation of Final Fantasy III in 1992.[75][76] The past decade has seen an increase in the number of non-video game adaptations and spin-offs. Final Fantasy: The Spirits Within has been adapted into a novel, the spin-off game Final Fantasy Crystal Chronicles has been adapted into a manga, and Final Fantasy XI had a novel and manga set in its continuity.[77][78][79][80] Seven novellas based on the Final Fantasy VII universe have also been released. The Final Fantasy: Unlimited story was partially continued in novels and a manga after the anime series ended.[81] The Final Fantasy X and XIII series have also had novellas and audio dramas released. Final Fantasy Tactics Advance has been adapted into a radio drama, and Final Fantasy: Unlimited has received a radio drama sequel.
This disambiguation page lists articles associated with the title Twist. If an internal link led you here, you may wish to change the link to point directly to the intended article.
This disambiguation page lists articles associated with the title Portal. If an internal link led you here, you may wish to change the link to point directly to the intended article.
The family was conceived by Groening shortly before a solicitation for a series of animated shorts with producer Brooks. He created a dysfunctional family and named the characters after his own family members, substituting Bart for his own name; he thought Simpson was a funny name in that it sounded similar to "simpleton".[4] The shorts became a part of The Tracey Ullman Show on April 19, 1987. After three seasons, the sketch was developed into a half-hour prime time show and became Fox's first series to land in the Top 30 ratings in a season (1989–1990).
On January 26, 2023, the series was renewed for its 35th and 36th seasons, taking the show through the 2024–25 television season.[6] Both seasons contain a combined total of 51 episodes. Seven of these episodes are season 34 holdovers, while the other 44 will be produced in the production cycle of the upcoming seasons, bringing the show's overall episode total up to 801.[7] Season 35 premiered on October 1, 2023.[8]
The Simpsons received widespread acclaim throughout its early seasons in the 1990s, which are generally considered its "golden age". Since then, it has been criticized for a perceived decline in quality. Time named it the 20th century's best television series,[9] and Erik Adams of The A.V. Club named it "television's crowning achievement regardless of format".[10] On January 14, 2000, the Simpson family was awarded a star on the Hollywood Walk of Fame. It has won dozens of awards since it debuted as a series, including 37 Primetime Emmy Awards, 34 Annie Awards, and 2 Peabody Awards. Homer's exclamatory catchphrase of "D'oh!" has been adopted into the English language, while The Simpsons has influenced many other later adult-oriented animated sitcom television series.
The main characters are the Simpson family, who live in the fictional "Middle America" town of Springfield.[11]Homer, the father, works as a safety inspector at the Springfield Nuclear Power Plant, a position at odds with his careless, buffoonish personality. He is married to Marge (née Bouvier), a stereotypical American housewife and mother. They have three children: Bart, a ten-year-old troublemaker and prankster; Lisa, a precocious eight-year-old activist; and Maggie, the baby of the family who rarely speaks, but communicates by sucking on a pacifier. Although the family is dysfunctional, many episodes examine their relationships and bonds with each other and they are often shown to care about one another.[12]
The creators originally intended many of these characters as one-time jokes or for fulfilling needed functions in the town. A number of them have gained expanded roles and subsequently starred in their own episodes. According to Matt Groening, the show adopted the concept of a large supporting cast from the comedy show SCTV.[14]
Despite the depiction of yearly milestones such as holidays or birthdays passing, the characters never age. The series uses a floating timeline in which episodes generally take place in the year the episode is produced. Flashbacks and flashforwards do occasionally depict the characters at other points in their lives, with the timeline of these depictions also generally floating relative to the year the episode is produced. For example, the 1991 episodes "The Way We Was" and "I Married Marge" depict Homer and Marge as high schoolers in the 1970s who had Bart (who is always 10 years old) in the early '80s, while the 2008 episode "That '90s Show" depicts Homer and Marge as a childless couple in the '90s, and the 2021 episode "Do Pizza Bots Dream of Electric Guitars" portrays Homer as an adolescent in the same period. The 1995 episode "Lisa's Wedding" takes place during Lisa's college years in the then-future year of 2010, the same year the show began airing its 22nd season, in which Lisa was still 8. Regarding the contradictory flashbacks, Selman stated that "they all kind of happened in their imaginary world."[15]
The show follows a loose and inconsistent continuity. For example, Krusty the Clown may be able to read in one episode, but not in another. However, it is consistently portrayed that he is Jewish, that his father was a rabbi, and that his career began in the 1960s. The latter point introduces another snag in the floating timeline: historical periods that are a core part of a character's backstory remain so even when their age makes it unlikely or impossible, such as Grampa Simpson and Principal Skinner's respective service in World War II and Vietnam.
The only episodes not part of the series' main canon are the Treehouse of Horror episodes, which often feature the deaths of main characters. Characters who die in "regular" episodes, such as Maude Flanders, Mona Simpson and Edna Krabappel, however, stay dead. Most episodes end with the status quo being restored, though occasionally major changes will stick, such as Lisa's conversions to vegetarianism and Buddhism, the divorce of Milhouse van Houten's parents, and the marriage and subsequent parenthood of Apu and Manjula.
The Simpsons takes place in a fictional American town called Springfield. Although there are many real settlements in America named Springfield,[16] the town the show is set in is fictional. The state it is in is not established. In fact, the show is intentionally evasive with regard to Springfield's location.[17] Springfield's geography and that of its surroundings is inconsistent: from one episode to another, it may have coastlines, deserts, vast farmland, mountains, or whatever the story or joke requires.[18] Groening has said that Springfield has much in common with Portland, Oregon, the city where he grew up.[19] Groening has said that he named it after Springfield, Oregon, and the fictitious Springfield which was the setting of the series Father Knows Best. He "figured out that Springfield was one of the most common names for a city in the U.S. In anticipation of the success of the show, I thought, 'This will be cool; everyone will think it's their Springfield.' And they do."[20] Many landmarks, including street names, have connections to Portland.[21]
When producer James L. Brooks was working on the television variety show The Tracey Ullman Show, he decided to include small animated sketches before and after the commercial breaks. Having seen one of cartoonist Matt Groening's Life in Hell comic strips, Brooks asked Groening to pitch an idea for a series of animated shorts. Groening initially intended to present an animated version of his Life in Hell series.[22] However, Groening later realized that animating Life in Hell would require the rescinding of publication rights for his life's work. He therefore chose another approach while waiting in the lobby of Brooks's office for the pitch meeting, hurriedly formulating his version of a dysfunctional family that became the Simpsons.[22][23] He named the characters after his own family members, substituting "Bart" for his own name, adopting an anagram of the word brat.[22]
The Simpson family first appeared as shorts in The Tracey Ullman Show on April 19, 1987.[24] Groening submitted only basic sketches to the animators and assumed that the figures would be cleaned up in production. However, the animators merely re-traced his drawings, which led to the crude appearance of the characters in the initial shorts.[22] The animation was produced domestically at Klasky Csupo,[25][26] with Wes Archer, David Silverman, and Bill Kopp being animators for the first season.[27] The colorist, "Georgie" Gyorgyi Kovacs Peluce (Kovács Györgyike)[28][29][30][31][32][33] made the characters yellow; as Bart, Lisa and Maggie have no hairlines, she felt they would look strange if they were flesh-colored. Groening supported the decision, saying: "Marge is yellow with blue hair? That's hilarious — let's do it!"[27]
In 1989, a team of production companies adapted The Simpsons into a half-hour series for the Fox Broadcasting Company. The team included the Klasky Csupo animation house. Brooks negotiated a provision in the contract with the Fox network that prevented Fox from interfering with the show's content.[34] Groening said his goal in creating the show was to offer the audience an alternative to what he called "the mainstream trash" that they were watching.[35] The half-hour series premiered on December 17, 1989, with "Simpsons Roasting on an Open Fire".[36] "Some Enchanted Evening" was the first full-length episode produced, but it did not broadcast until May 1990, as the last episode of the first season, because of animation problems.[37] In 1992, Tracey Ullman filed a lawsuit against Fox, claiming that her show was the source of the series' success. The suit said she should receive a share of the profits of The Simpsons[38]—a claim rejected by the courts.[39]
Matt Groening and James L. Brooks have served as executive producers during the show's entire history, and also function as creative consultants. Sam Simon, described by former Simpsons director Brad Bird as "the unsung hero" of the show,[40] served as creative supervisor for the first four seasons. He was constantly at odds with Groening, Brooks and the show's production company Gracie Films and left in 1993.[41] Before leaving, he negotiated a deal that sees him receive a share of the profits every year, and an executive producer credit despite not having worked on the show since 1993,[41][42] at least until his passing in 2015.[43] A more involved position on the show is the showrunner, who acts as head writer and manages the show's production for an entire season.[27]
The first team of writers, assembled by Sam Simon, consisted of John Swartzwelder, Jon Vitti, George Meyer, Jeff Martin, Al Jean, Mike Reiss, Jay Kogen and Wallace Wolodarsky.[44] Newer Simpsons' writing teams typically consist of sixteen writers who propose episode ideas at the beginning of each December.[45] The main writer of each episode writes the first draft. Group rewriting sessions develop final scripts by adding or removing jokes, inserting scenes, and calling for re-readings of lines by the show's vocal performers.[46] Until 2004,[47] George Meyer, who had developed the show since the first season, was active in these sessions. According to long-time writer Jon Vitti, Meyer usually invented the best lines in a given episode, even though other writers may receive script credits.[46] Each episode takes six months to produce so the show rarely comments on current events.[48]
This program unpacks Playstation 3 Theme files (.p3t) so that you can touch-up an existing theme to your likings or use a certain wallpaper from it (as many themes have multiple). But remember, if you use content from another theme and release it, be sure to give credit!
Download p3textractor.zip from above. Extract the files to a folder with a program such as WinZip or WinRAR. Now there are multiple ways to extract the theme.
The first way is to simply open the p3t file with p3textractor.exe. If you don’t know how to do this, right click the p3t file and select Open With. Alternatively, open the p3t file and it will ask you to select a program to open with. Click Browse and find p3textractor.exe from where you previously extracted it to. It will open CMD and extract the theme to extracted.[filename]. After that, all you need to do for any future p3t files is open them and it will extract.
The second way is very simple. Just drag the p3t file to p3textractor.exe. It will open CMD and extract the theme to extracted.[filename].
For the third way, first put the p3t file you want to extract into the same folder as p3textractor.exe. Open CMD and browse to the folder with p3extractor.exe. Enter the following: p3textractor filename.p3t [destination path]Replace filename with the name of the p3t file, and replace [destination path] with the name of the folder you want the files to be extracted to. A destination path is not required. By default it will extract to extracted.filename.
This program unpacks Playstation 3 Theme files (.p3t) so that you can touch-up an existing theme to your likings or use a certain wallpaper from it (as many themes have multiple). But remember, if you use content from another theme and release it, be sure to give credit!
Download p3textractor.zip from above. Extract the files to a folder with a program such as WinZip or WinRAR. Now there are multiple ways to extract the theme.
The first way is to simply open the p3t file with p3textractor.exe. If you don’t know how to do this, right click the p3t file and select Open With. Alternatively, open the p3t file and it will ask you to select a program to open with. Click Browse and find p3textractor.exe from where you previously extracted it to. It will open CMD and extract the theme to extracted.[filename]. After that, all you need to do for any future p3t files is open them and it will extract.
The second way is very simple. Just drag the p3t file to p3textractor.exe. It will open CMD and extract the theme to extracted.[filename].
For the third way, first put the p3t file you want to extract into the same folder as p3textractor.exe. Open CMD and browse to the folder with p3extractor.exe. Enter the following: p3textractor filename.p3t [destination path]Replace filename with the name of the p3t file, and replace [destination path] with the name of the folder you want the files to be extracted to. A destination path is not required. By default it will extract to extracted.filename.
Iron, shown here as fragments and a 1 cm3 cube, is an example of a chemical element that is a metal.A metal in the form of a gravy boat made from stainless steel, an alloy largely composed of iron, carbon, and chromium
A metal (from Ancient Greekμέταλλον (métallon) 'mine, quarry, metal') is a material that when polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well. These properties are all associated with having electrons available at the Fermi level, as against nonmetallic materials which do not.[1]: Chpt 8 & 19 [2]: Chpt 7 & 8 Metals are typically ductile (can be drawn into wires) and malleable (they can be hammered into thin sheets).[3]
A metal conducts electricity at a temperature of absolute zero,[5] which is a consequence of the states at the Fermi energy.[1][2] Many elements and compounds become metallic under high pressures, for example, iodine gradually becomes a metal at a pressure of between 40 and 170 thousand times atmospheric pressure. Sodium becomes a nonmetal at pressure of just under two million times atmospheric pressure, and at even higher pressures it is expected to become a metal again
When discussing the periodic table and some chemical properties the term metal is often used to denote those elements which in pure form and at standard conditions are metals in the sense of electrical conduction mentioned above. The related term metallic may also be used for types of dopant atoms or alloying elements.
In astronomy metal refers to all chemical elements in a star that are heavier than helium. In this sense the first four "metals" collecting in stellar cores through nucleosynthesis are carbon, nitrogen, oxygen, and neon. A star fuses lighter atoms, mostly hydrogen and helium, into heavier atoms over its lifetime. The metallicity of an astronomical object is the proportion of its matter made up of the heavier chemical elements.[6][7]
The strength and resilience of some metals has led to their frequent use in, for example, high-rise building and bridge construction, as well as most vehicles, many home appliances, tools, pipes, and railroad tracks. Precious metals were historically used as coinage, but in the modern era, coinage metals have extended to at least 23 of the chemical elements.[8] There is also extensive use of multi-element metals such as titanium nitride or degenerate semiconductors in the semiconductor industry.
The history of refined metals is thought to begin with the use of copper about 11,000 years ago. Gold, silver, iron (as meteoric iron), lead, and brass were likewise in use before the first known appearance of bronze in the fifth millennium BCE. Subsequent developments include the production of early forms of steel; the discovery of sodium—the first light metal—in 1809; the rise of modern alloy steels; and, since the end of World War II, the development of more sophisticated alloys.
Most metals are shiny and lustrous, at least when polished, or fractured. Sheets of metal thicker than a few micrometres appear opaque, but gold leaf transmits green light. This is due to the electrons which reflect light.[1][2]
Although most elemental metals have higher densities than nonmetals,[9] is a wide variation in their densities, lithium being the least dense (0.534 g/cm3) and osmium (22.59 g/cm3) the most dense. (Some of the 6d transition metals are expected to be denser than osmium, but predictions on their densities vary widely in the literature, and in any case their known isotopes are too unstable for bulk production to be possible.) Magnesium, aluminium and titanium are light metals of significant commercial importance. Their respective densities of 1.7, 2.7, and 4.5 g/cm3 can be compared to those of the older structural metals, like iron at 7.9 and copper at 8.9 g/cm3. An iron ball would thus weigh about as much as three aluminum balls of equal volume.
A metal rod with a hot-worked eyelet. Hot-working exploits the capacity of metal to be plastically deformed.
Metals are typically malleable and ductile, deforming under stress without cleaving.[9] The nondirectional nature of metallic bonding contributes to the ductility of most metallic solids, where the Peierls stress is relatively low allowing for dislocation motion, and there are also many combinations of planes and directions for plastic deformation.[10] Due to their having close packed arrangements of atoms the Burgers vector of the dislocations are fairly small, which also means that the energy needed to produce one is small.[3][10] In contrast, in an ionic compound like table salt the Burgers vectors are much larger and the energy to move a dislocation is far higher.[3] Reversible elastic deformation in metals can be described well by Hooke's Law for the restoring forces, where the stress is linearly proportional to the strain.[11]
The atoms of simple metallic substances are often in one of three common crystal structures, namely body-centered cubic (bcc), face-centered cubic (fcc), and hexagonal close-packed (hcp). In bcc, each atom is positioned at the center of a cube of eight others. In fcc and hcp, each atom is surrounded by twelve others, but the stacking of the layers differs. Some metals adopt different structures depending on the temperature.[12]
Body-centered cubic crystal structure, with a 2-atom unit cell, as found in e.g. chromium, iron, and tungsten
Face-centered cubic crystal structure, with a 4-atom unit cell, as found in e.g. aluminum, copper, and gold
Hexagonal close-packed crystal structure, with a 6-atom unit cell, as found in e.g. titanium, cobalt, and zinc
Here, height is energy while width is the density of available states for a certain energy in the material listed. The shading follows the Fermi–Dirac distribution (black=all states filled, white=no state filled).
The Fermi levelEF is the energy level at which the electrons are in a position to interact with energy levels above them. In metals and semimetals the Fermi levelEF lies inside at least one band of energy states.
The electronic structure of metals means they are relatively good conductors of electricity. The electrons all have different momenta, which average to zero when there is no external voltage. When a voltage is applied some move a little faster in a given direction, some a little slower so there is a nett drift velocity which leads to an electric current.[1][2]Quantum mechanics dictates that one can only have one electron in a given states, the Pauli exclusion principle.[14] Therefore there have to be empty states available at the highest occupied energies as sketched in the Figure. In a semiconductor like silicon or a nonmetal like strontium titanate there is an energy gap between the highest filled states of the electrons and the lowest unfilled. Consequently, semiconductors and nonmetals are relatively poor conductors, although they can carry some current when doped with elements that introduce additional energy states or at higher temperatures.[15]
The elemental metals have electrical conductivity values of from 6.9 × 103S/cm for manganese to 6.3 × 105 S/cm for silver. In contrast, a semiconducting metalloid such as boron has an electrical conductivity 1.5 × 10−6 S/cm. With one exception, metallic elements reduce their electrical conductivity when heated. Plutonium increases its electrical conductivity when heated in the temperature range of around −175 to +125 °C, with anomalously large thermal expansion coefficient and a phase change from monoclinic to face-centered cubic near 100 °C.[16]
Metals are relatively good conductors of heat. At higher temperatures they can occupy slightly higher energy levels which are given by Fermi–Dirac statistics.[2][15] These have slightly higher momenta (kinetic energy) so can pass on thermal energy.
The contribution of a metal's electrons to its heat capacity and thermal conductivity, and the electrical conductivity of the metal itself can be approximately calculated from the free electron model.[2] However, this does not take into account the detailed structure of the metal's ion lattice. Taking into account the positive potential caused by the arrangement of the ion cores enables consideration of the electronic band structure and binding energy of a metal. Various models are applicable, the simplest being the nearly free electron model.[2] Modern methods such as density functional theory are typically used.
The elements which form metals usually form cations through electron loss.[9] Most will react with oxygen in the air to form oxides over various timescales (potassium burns in seconds while iron rusts over years) which depend upon whether the native oxide forms a passivation layer that acts as a
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