Zinc Properties

General

Name, symbol, number Zinc, Zn, 30
Chemical series Transition metals
Group, period, block 12, 4, d
Appearance Bluish pale gray
Atomic mass 65.409(4) g/mol
Electron configuration [Ar] 3d10 4s2
Electrons per shell 2, 8, 18, 2


Physical Properties

Phase Solid
Density (near r.t.) 7.14 g.cm-3
Liquid density at m.p. 6.57 g.cm-3
Melting point 692.68 K (419.53°C, 787.15°F)
Boiling point 1180 K (907°C, 1665°F)
Heat of fusion 7.32 kJ.mol-1
Heat of vaporization 123.6 kJ.mol-1
Heat capacity (25°C) 25.390 J.mol-1.K-1


Vapor Pressure

P/Pa 1 10 100 1K 10K 100K
at T/K 610 670 750 852 990 (1185)

 

 


Atomic Properties

Crystal structure Hexagonal
Oxidation states 2 (amphoteric oxide)
Electronegativity 1.65 (Pauling scale)
Ionization energies (more)

1st: 906.4 kJ.mol-1
2nd: 1733.3 kJ.mol-1
3rd: 3833 kJ.mol-1

Atomic radius 135 pm
Atomic radius (calc.) 142 pm
Covalent radius 131 pm
Van der Waals radius 139 pm


Miscellaneous

Magnetic ordering Diamagnetic
Electrical resistivity (20°C) 59.0 nΩ.m
Thermal conductivity (300 K) 116 W.m-1.k-1
Thermal expansion (25°C) 30.2 um.m-1.k-1
Speed of sound (thin rod) (r.t.) (rolled) 3850 m.s-1
Young's modulus 108 GPa
Shear modulus 43 GPa
Bulk modulus 70 GPa
Poisson ratio 0.25
Mohs hardness 2.5
Brinell hardness 412 MPa
CAS registry number 7440-66-6


Notable Isotopes of Zinc

iso NA half-life DM DE (MeV) DP
64Zn 48.6% Zn is stable with 34 neutrons.      
65Zn syn 244.26 d

ε / Y

- / 1.1155 65Cu / -
66Zn 27.9% Zn is stable with 36 neutrons.      
67Zn 4.1% Zn is stable with 37 neutrons.      
68Zn 18.8% Zn is stable with 38 neutrons.      
69Zn syn 56.4 min

 

β-

0.906 69Ga
70Zn 0.6% Zn is stable with 40 neutrons.      

Zinc Basics