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Zinc (Zn)

From Wikipedia, the free encyclopediaZinc, in commerce also spelter, is a chemical element with symbol Zn and atomic number 30. It is the first element of group 12 of the periodic table. In some respects zinc is chemically similar to magnesium:its ion is of similar size and its only common oxidation state is +2.

Zinc in the periodic table

SymbolZn
Atomic number30
Group12
Period4
Blockd
Element categoryTransition Metal

Physical properties

Phase at STPSolid
Density7.14 g/cm3
Atomic weight65.382 u
Melting point692.68 K
419.53 °C
787.154 °F
Boiling point1180 K
906.85 °C
1664.33 °F

Atomic properties

Electronegativity (Pauling Scale)1.65
Electron affinity-58 kJ/mol
Oxidation states−2, 0, +1, +2
(an amphoteric oxide)
Ionization energies
1906.4 kJ/mol
2 1733.3 kJ/mol
3 3833 kJ/mol
4 5731 kJ/mol
5 7970 kJ/mol
6 10400 kJ/mol
7 12900 kJ/mol
8 16800 kJ/mol
9 19600 kJ/mol
10 23000 kJ/mol
11 26400 kJ/mol
12 29990 kJ/mol
13 40490 kJ/mol
14 43800 kJ/mol
15 47300 kJ/mol
16 52300 kJ/mol
17 55900 kJ/mol
18 59700 kJ/mol
19 67300 kJ/mol
20 71200 kJ/mol
21 179100 kJ/mol

Electron configuration

Elektronkonfiguration (shorthand)[Ar] 3d10 4s2
Electron configuration1s2 2s2 2p6 3s2 3p6 3d1 4s2
Electrons per shell2, 8, 18, 2

History

Discovered-1000
Discovered byIndian metallurgists
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