Stable isotope Zinc (Zn)

Isotope Z(p) N(n) Atomic Mass Natural Abundance Enrichment Level Chemical Form
Zn-64 29 35 63.929146 48.60% >99.00% Metal
Zn-64 29 35 63.929146 48.60% >99.00% Oxide
Zn-66 29 37 65.926036 27.90% ≥98.70% Metal
Zn-66 29 37 65.926036 27.90% ≥98.70% Oxide
Zn-67 29 38 66.927131 4.10% ≥89.60% Metal
Zn-67 29 38 66.927131 4.10% ≥89.60% Oxide
Zn-67 29 38 66.927131 4.10% ≥89.60% Sulphate
Zn-68 29 39 67.924847 18.80% >99.00% Metal
Zn-68 29 39 67.924847 18.80% >99.00% Oxide
Zn-70 29 41 69.925325 0.60% >95.00% Metal
Zn-70 29 41 69.925325 0.60% ≥98.70% Oxide

Properties of Zinc

Name Zinc
Symbol Zn
Atomic number 30
Atomic weight 65.39
Standard state Solid at 298 °K
CAS Registry ID 7440-66-6
Group in periodic table 12
Group name None
Period in periodic table 4
Block in periodic table d-block
Color Bluish pale gray
Classification Metallic
Melting point 419.6 °C
Boiling point 907 °C
Vaporization point 907 ºC
Thermal conductivity 116 W/(m·K) at 298.2 °K
Electrical resistivity 5.92 µΩ·cm at 20 °C
Electronegativity 1.6
Specific heat 0.39 kJ/kg K
Heat of vaporization 119 kJ·mol-1
Heat of fusion 7.35 kJ·mol-1
Density of solid 7.14 g/cm3
Electron configuration [Ar]3d104s2
Atomic radius 1.34 Å
Ionic radius 0.60 Å (coordination number 4) and 0.74 Å (coordination number 6)
Oxidation state +2