Stable isotope Mercury (Hg)

Isotope Z(p) N(n) Atomic Mass Natural Abundance Enrichment Level Chemical Form
Hg-196 80 116 195.965814 0.15% 51.00-95.00% Metal
Hg-196 80 116 195.965814 0.15% 51.00-95.00% Oxide
Hg-198 80 118 197.966752 9.97% 94.00-99.00% Metal
Hg-198 80 118 197.966752 9.97% 94.00-99.00% Oxide
Hg-199 80 119 198.968262 16.87% ≥90.00% Metal
Hg-199 80 119 198.968262 16.87% ≥90.00% Oxide
Hg-200 80 120 199.968309 23.10% ≥95.00% Metal
Hg-200 80 120 199.968309 23.10% ≥95.00% Oxide
Hg-202 80 122 201.970625 29.86% ≥99.00% Metal
Hg-202 80 122 201.970625 29.86% ≥99.00% Oxide
Hg-204 80 124 203.973475 6.87% ≥96.00% Metal
Hg-204 80 124 203.973475 6.87% ≥96.00% Oxide
 

Properties of Mercury

Name Mercury
Symbol Hg
Atomic number 80
Atomic weight 200.59
Standard state Liquid at 298 ºK (the heaviest known element liquid)
CAS Registry ID 7439-97-6
Group in periodic table 12
Group name None
Period in periodic table 6
Block in periodic table d-block
Color Silvery white
Classification Metallic
Melting point -38.842 °C
Boiling point 356.58 °C
Thermal conductivity 8.3 W/(m·K) at 298.2 °K
Electrical resistivity 98.4 µΩ·cm at 50 °C
Electronegativity 1.9
Specific heat 0.14 kJ/kg K
Heat of vaporization 59.0 kJ·mol-1 at 356.58 °C
Heat of fusion 11.3 kJ/kg
Density of liquid 13.53 g/cm3
Electron configuration [Xe]4f145d106s2
Atomic radius 1.51 Å
Ionic radius Hg2+: 1.16 Å (coordination number 6)
Ionization potential 10.437 eV (1st) and 18.756 eV (2nd)
Oxidation states +1, +2
Critical temperature 1477 ºC
Critical pressure 732 atm
Critical volume 43 cm3/mol