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Gold (Au)

Gold (Au) is element 79 of the periodic table, a transition metal in period 6 and group 11. Its standard atomic weight is 196.96657, so one mole of gold atoms has a mass of 196.96657 g. At room temperature it is a solid; it melts at 1064.18 °C and boils at 2855.85 °C.

79 Au Gold 196.96657

Period 6, group 11 · Transition metal

← Pt Platinum Hg Mercury →

Atomic number	79
Symbol	Au
Standard atomic weight	196.96657
Molar mass	196.96657 g/mol
Category	Transition metal
Group	11
Period	6
Block	d-block
Electron configuration	[Xe] 6s¹ 4f¹⁴ 5d¹⁰
Oxidation states	+3, +1
Electronegativity (Pauling)	2.54
Atomic radius (van der Waals)	166 pm
First ionisation energy	9.226 eV (890.2 kJ/mol)
Electron affinity	2.309 eV
State at room temperature	Solid
Melting point	1337.33 K (1064.18 °C)
Boiling point	3129 K (2855.85 °C)
Density	19.282 g/cm³
Discovered	Known since antiquity

Group 11

Cu · Copper Ag · Silver Rg · Roentgenium

Calculate with Gold

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Atomic weight: IUPAC CIAAW standard atomic weight. Other properties: PubChem (U.S. National Library of Medicine, public domain). Values such as melting point and radius depend on how they were measured; check a data book for precise work.