NO. 079Transition

Au

Gold

Gold is a highly valued noble metal used in jewelry, electronics, and finance.

Crystal Structure

Face-centered cubic (fcc)

Atomic Mass196.97 u

Density19.32 g/cm³

Melting Point1337 K

Boiling Point3129 K

Atomic Radius144 pm

Electronegativity2.54

Ionization Energy890 kJ/mol

Electron Affinity223 kJ/mol

Bonding TypeMetallic

Oxidation States1, 3

Acid/BaseNeutral

ReactivityLow

Electron Configuration

[Xe] 4f14 5d10 6s1

Discovered ByAncient civilizations

Year-6000

Known Isotopes

Au-197