Information

Gold (Au) properties


Atomic mass, symbol and atomic number

gold is a naturally occurring element with the element symbol Au and atomic number 79. In the periodic table it stands with an atomic mass of 196,966 u in the 1st subgroup. The chemical element is not radioactive and is in a solid state at room temperature.

Profile: Gold

General
Chemical element:gold
Symbol:Au
Atomic number:79
Group:copper group
Period:6
Block:d-block
Series:Transition metals
Appearance:golden yellow
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Year of discovery:primeval
Atomic properties
Atomic mass:196,966 and
Atomic radius:135 pm
Covalent radius:136 pm
Van der Waals radius:166 pm
Electron configuration:Xe 4f14 5d10 6s1
ionization:890.1 kJ / mol
Physical Properties
Physical state:firmly
Density:???
Crystal structure:cubic
Magnetism:diamagnetic
molar volume:10,21 · 10-6 m3/ mol
Mohs hardness:3
Melting point:1064 ° C
Boiling point:2970 ° C
Heat of fusion:12.55 kJ / mol
Heat of vaporization:342 kJ / mol
Thermal conductivity:320 W
Chemical properties
electronegativity:2,54

Did you know that ...

  • theoretically gold could also be extracted from seawater, but the process would be too expensive?
  • Gold have been mined by humans since the Copper Age?
  • in noble restaurants the dishes are "refined" with gold leaf?
  • the weight of gold is usually given in ounces? (1 ounce = approx. 31.1 g)
  • China, Russia, Australia, South Africa and the US promote the most gold worldwide?
  • Gold is also used in the construction of computer boards because of its conductivity?