gold

gold
gold
Symbol: Au
Atomic number: 79
Atomic weight: 196.96655
Gold is gold colored. It is the most malleable and ductile metal known. There is only one stable isotope of gold, and five radioisotopes of gold, Au-195 being the most stable with a half-life of 186 days. Gold is used as a monetary standard, in jewelry, dentistry, electronics. Au-198 is used in treating cancer and some other medical conditions. Gold has been known to exist as far back as 2600 BC. Gold comes from the Anglo-Saxon word gold. Its symbol, Au, comes from the Latin word aurum, which means gold. Gold is not particularly toxic, however it is known to cause damage to the liver and kidneys in some.

Elements of periodic system. 2013.

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  • Gold — (g[=o]ld), n. [AS. gold; akin to D. goud, OS. & G. gold, Icel. gull, Sw. & Dan. guld, Goth. gul[thorn], Russ. & OSlav. zlato; prob. akin to E. yellow. [root]49, 234. See {Yellow}, and cf. {Gild}, v. t.] [1913 Webster] 1. (Chem.) A metallic… …   The Collaborative International Dictionary of English

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  • Gold CD — A gold CD is one in which gold is used in place of the super purity aluminiumcommonly used as the reflective coating on ordinary CDs.The gold coats more evenly and reacts with oxygen slower, thusreducing CD rot and providing greater longevity.The …   Wikipedia

  • gold — Aluminium Al u*min i*um ([a^]l [ u]*m[i^]n [i^]*[u^]m), n. [L. alumen. See {Alum}.] (Chem.) same as {aluminum}, chiefly British in usage. [1913 Webster] {Aluminium bronze} or {gold}, a pale gold colored alloy of aluminium and copper, used for… …   The Collaborative International Dictionary of English

  • gold — See: HEART OF GOLD …   Dictionary of American idioms

  • gold — See: HEART OF GOLD …   Dictionary of American idioms

  • gold — Watch Watch (w[o^]ch), n. [OE. wacche, AS. w[ae]cce, fr. wacian to wake; akin to D. wacht, waak, G. wacht, wache. [root]134. See {Wake}, v. i. ] [1913 Webster] 1. The act of watching; forbearance of sleep; vigil; wakeful, vigilant, or constantly… …   The Collaborative International Dictionary of English

  • Gold (color) — Gold tone redirects here. For the type of photographic print, see Gold tone (print). Gold (golden) Color coordinates Hex triplet #FFD700 …   Wikipedia

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