79 · Au
Gold
Known since antiquity, with no discovery year.
Identity
- Atomic number
- 79
- Symbol
- Au
- Canonical name
- Gold
- Category
- transition metal
- Group
- 11
- Period
- 6
- Block
- d
- Other names
- aurum
Properties
These quantities come from the Periodic Table JSON compilation. They have not yet been checked, one by one, against CIAAW atomic weights or NIST measurements. A value marked estimated is not a measurement.
- Atomic mass
- 196.96657 u
- Electron configuration
- [Xe] 4f14 5d10 6s1
- Electrons per shell
- 2, 8, 18, 32, 18, 1
- Standard state
- solid
- Density
- 19.3 g/cm³
- Melting point
- 1,337.33 K
- Boiling point
- 3,243 K
- Electronegativity
- 2.54 Pauling
- First ionization energy
- 890.1 kJ/mol
- Electron affinity
- 222.747 kJ/mol
Notable isotopes
This summary is not an inventory of every isotope.
- Au-197 · 100 % · stable
History
Antiquity
Gold was worked in antiquity. No discovery year can be assigned.
Etymology
- Theme
- color
- Language
- latin
- Root
- aurum
- Meaning
- gold, the shining metal