Periodic Table of Elements

79

Gold

196.97

Gold has been known since prehistoric times. It may have been the first metal used by humans and was valued for ornamentation and rituals. Egyptian hieroglyphs from as early as 2600 BC describe gold.

Name: Gold
Symbol: Au
Atomic number: 79
Atomic weight: 196.97
State: solid
Group, period, block: 11, 6, d
Color: metallic yellow
Classification: transition metal
Electron configuration: 4f14 5d10 6s1
2,8,18,32,18,1

Physical properties

Density: 19.30 g/cm-3
Melting point: 1337.33 K, 1064.18 C, 1947.52 F
Boiling point: 3129 K, 2856 C, 5173 F

Atomic properties

Oxidation states: 5, 4, 3, 2, 1, -1, -2
Electronegativity: 2.54 (Pauling scale)
Ionization energies: 1st: 890.1 kJmol-1
Covalent radius: 1366 pm
Van der Waals radius: 166 pm
  • Au
  • Electron Configuration

Isotopes

There is one naturally occurring isotope of gold exists, 197Au.