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Gold
Chemical Element
Gold is a chemical element with the symbol Au and atomic number 79. It is a dense, soft, malleable, and ductile metal with a bright yellow color and luster that is considered attractive, which is maintained without tarnishing in air or water.
Symbol: Au
Melting point: 1,064 °C
Electron configuration: [Xe] 4f14 5d10 6s1
Atomic number: 79
Boiling point: 2,856 °C
Atomic mass: 196.96657 ± 0.000004 u
Silver
Chemical Element
Silver is a chemical element with the chemical symbol Ag and atomic number 47. A soft, white, lustrous transition metal, it possesses the highest electrical conductivity of any element and the highest thermal conductivity of any metal.
Symbol: Ag
Melting point: 961.8 °C
Electron configuration: Kr 4d10 5s1
Atomic number: 47
Discovered: 5000 BC
Atomic mass: 107.8682 u
Copper
Chemical Element
Copper is a chemical element with the symbol Cu and atomic number 29. It is a ductile metal with very high thermal and electrical conductivity. Pure copper is soft and malleable; a freshly exposed surface has a reddish-orange color.
Symbol: Cu
Melting point: 1,085 °C
Electron configuration: [Ar] 3d10 4s1
Atomic number: 29
Discovered: 9000 BC
Atomic mass: 63.546 ± 0.003 u
