Gold
English: Gold

A gold nugget, a piece of gold found in nature
Two golden 20 kr coins: the coin to the left is Swedish and the right one is Danish
Ancient golden crown, the Kritonios Crown, 370–360 BC. From a grave in Armento, Campania

Gold is a soft, dense, yellow metal. It is a chemical element. Its chemical symbol is Au. Its atomic number is 79. As a precious metal, it has been used for many thousands of years by people all over the world, for jewelry, and as money. Gold is important because it is rare, but also easier to use than other rare metals. It is also used to repair and replace teeth and in electronic equipment such as computers. The color of this metal is also called gold.

Mining methods for gold are similar to other metals. Gold is so valued that the discovery of a new place to mine has sometimes caused a gold rush. The deepest workplaces for miners in the world are in South African gold mines.

Often, gold is found as a native metal. This means it is not part of an ore, and does not need smelting. It may be in large, pure nuggets but more often must be separated from other minerals and soil.

Most of the gold on Earth is deep inside the Earth's core because it is dense. Nearly all discovered gold was deposited on the surface by meteorites.

Properties

In chemistry, gold is chemical element 79, a transition metal in Group 11. It has an atomic weight of 199.966 a.m.u. Its symbol is Au, from the Latin word for gold, aurum. It is a "noble metal" meaning it has low chemical reactivity.

Gold is very soft. It is malleable, meaning a goldsmith can hammer it into thin metal sheets. It is also ductile, which means it can be pulled into wire. When it is used in money or in jewelry, it is often alloyed with silver or some other metal to make it harder.

Most metals are gray in color. Gold is yellow because of the way its electrons behave.[1][2] The only other metal in common use that has a non-gray color is copper.

Metallic gold is non-toxic, which is unusual for a heavy metal. Soluble gold compounds, however, are toxic to the liver and kidneys.

Gold is a fairly good electrical conductor, but not as good as copper or silver. Copper and brass electrical connectors, especially those used with computer and audio/video equipment, are often plated with gold for corrosion resistance.

Nancy Johnson and her Olympic gold medal
Other Languages
Acèh: Meuih
Afrikaans: Goud
Alemannisch: Gold
አማርኛ: ወርቅ
Ænglisc: Gold
العربية: ذهب
aragonés: Oro
ܐܪܡܝܐ: ܕܗܒܐ
armãneashti: Malamâ
অসমীয়া: সোণ
asturianu: Oru
Avañe'ẽ: Kuarepotiju
Aymar aru: Quri
azərbaycanca: Qızıl
تۆرکجه: قیزیل
বাংলা: সোনা
Bahasa Banjar: Amas
Bân-lâm-gú: Kim
башҡортса: Алтын
беларуская: Золата
беларуская (тарашкевіца)‎: Золата
भोजपुरी: सोना
Bikol Central: Bulawan
български: Злато
Boarisch: Goid
བོད་ཡིག: གསེར།
bosanski: Zlato
brezhoneg: Aour
буряад: Алтан
català: Or
Чӑвашла: Ылтăн
Cebuano: Bulawan
čeština: Zlato
corsu: Oru
Cymraeg: Aur
dansk: Guld
davvisámegiella: Golli
Deutsch: Gold
Diné bizaad: Óola
eesti: Kuld
Ελληνικά: Χρυσός
emiliàn e rumagnòl: Ôr
English: Gold
эрзянь: Сырне
español: Oro
Esperanto: Oro
estremeñu: Oru
euskara: Urre
فارسی: طلا
Fiji Hindi: Sona
føroyskt: Gull
français: Or
Frysk: Goud
furlan: Aur
Gaeilge: Ór
Gaelg: Airh
Gàidhlig: Òr
galego: Ouro
ГӀалгӀай: Дошув
贛語:
Gĩkũyũ: Gold
ગુજરાતી: સોનું
客家語/Hak-kâ-ngî: Kîm
хальмг: Алтн
한국어:
հայերեն: Ոսկի
Արեւմտահայերէն: Ոսկի
हिन्दी: सोना
hornjoserbsce: Złoto
hrvatski: Zlato
Ido: Oro
Ilokano: Balitok
Bahasa Indonesia: Emas
interlingua: Auro
Iñupiak: Manik kaviqsuaq
isiXhosa: Igolide
isiZulu: Igolide
íslenska: Gull
italiano: Oro
עברית: זהב
Jawa: Emas
kalaallisut: Kuulti
ಕನ್ನಡ: ಚಿನ್ನ
Kapampangan: Gintu
ქართული: ოქრო
कॉशुर / کٲشُر: سۄن
kaszëbsczi: Złoto
қазақша: Алтын
Kiswahili: Dhahabu
коми: Зарни
Kongo: Wolo
Kreyòl ayisyen:
kurdî: Zêr
Кыргызча: Алтын
кырык мары: Шӧртньӹ
лакку: Муси
ລາວ: ທອງຄຳ
Latina: Aurum
latviešu: Zelts
Lëtzebuergesch: Gold
лезги: Къизил
lietuvių: Auksas
Ligure: Öo
Limburgs: Goud
lingála: Wólo
Livvinkarjala: Kuldu
la .lojban.: solji
lumbaart: Or
magyar: Arany
मैथिली: सोना
македонски: Злато
Malagasy: Volamena
മലയാളം: സ്വർണം
मराठी: सोने
მარგალური: ორქო
مصرى: دهب
Bahasa Melayu: Emas
Mìng-dĕ̤ng-ngṳ̄: Gĭng
Mirandés: Ouro
мокшень: Зирня
монгол: Алт
မြန်မာဘာသာ: ရွှေ
Nederlands: Goud
नेपाली: सुन
नेपाल भाषा: लुं
日本語:
Nordfriisk: Gul
norsk: Gull
norsk nynorsk: Gull
Nouormand: Or
Novial: Ore
occitan: Aur
олык марий: Шӧртньӧ
ଓଡ଼ିଆ: ସୁନା
oʻzbekcha/ўзбекча: Oltin
ਪੰਜਾਬੀ: ਸੋਨਾ
पालि: औरियम
پنجابی: سونا
Papiamentu: Oro
پښتو: سور زر
Patois: Guol
Перем Коми: Зарни
ភាសាខ្មែរ: មាស
Piemontèis: Òr (element)
Plattdüütsch: Gold
polski: Złoto
português: Ouro
Ripoarisch: Jold
română: Aur
rumantsch: Aur
Runa Simi: Quri
русиньскый: Золото
русский: Золото
саха тыла: Көмүс
ᱥᱟᱱᱛᱟᱲᱤ: ᱥᱚᱱᱟ
संस्कृतम्: सुवर्णम्
Scots: Gowd
Seeltersk: Gould
shqip: Ari
sicilianu: Oru
سنڌي: سون
slovenčina: Zlato
slovenščina: Zlato
словѣньскъ / ⰔⰎⰑⰂⰡⰐⰠⰔⰍⰟ: Ꙁлато
Soomaaliga: Dahab
کوردی: زێڕ
Sranantongo: Gowtu
српски / srpski: Злато
srpskohrvatski / српскохрватски: Zlato
Basa Sunda: Emas
suomi: Kulta
svenska: Guld
Tagalog: Ginto
தமிழ்: தங்கம்
татарча/tatarça: Алтын
తెలుగు: బంగారం
ไทย: ทองคำ
тоҷикӣ: Тилло
Tsetsêhestâhese: Véhone-ma'kaata
ತುಳು: ಬಂಗಾರ್
Türkçe: Altın
українська: Золото
اردو: سونا
ئۇيغۇرچە / Uyghurche: ئالتۇن
Vahcuengh: Gim
vèneto: Oro
vepsän kel’: Kuld
Tiếng Việt: Vàng
Volapük: Goldin
Võro: Kuld
walon: Ôr
文言: 金 (元素)
Winaray: Bulawan
吴语:
ייִדיש: גאלד
Yorùbá: Wúrà
粵語:
Zazaki: Zern
žemaitėška: Auksos
中文: