Chemicool

Zn

30

65.38
Zinc
General | States | Energies | Oxidation & Electrons |Appearance & Characteristics
Reactions | Other Forms |Radius | Conductivity | Abundance
Encyclopedia Britannica articles

General
Name Zinc Symbol Zn
atomic number 30 Atomic weight 65.38
Density @ 293 K 7.14 g/cm3 Atomic volume 9.2 cm3/mol
Group Trans. Met. discovered 1600

States
state (s, l, g) s
melting point 692.78 K boiling point 1180 K
Heat of fusion 7.322 kJ/mol Heat of vaporization 115.30 kJ/mol
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Energies
1st ionization energy 906.4 kJ/mole electronegativity 1.65
2nd ionization energy 1733.2 kJ/mole electron affinity kJ/mole
3rd ionization energy 3832.6 kJ/mole Specific heat 0.39 J/gK
heat atomization 131 kJ/mole atoms

Oxidation & Electrons
Shells 2,8,18,2 electron configuration [Ar] 3d10 4s2
minimum oxidation number 0 maximum oxidation number 2
min. common oxidation no. 0 max. common oxidation no. 2
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Appearance & Characteristics
structure distorted hcp structure color silvery
uses batteries, galvanizing toxicity
hardness 2.5 mohs characteristics brittle

Reactions
reaction with air vigorous, = ZnO reaction with 6M HCl mild, = H2, ZnCl2
reaction with 6M HCl mild, = H2, ZnCl2 reaction with 15M HNO3 vigorous, = Zn(NO3)2, NOx
reaction with 6M NaOH mild, = [Zn(OH)4](2-), H2
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Other Forms
number of isotopes 5 hydride(s) ZnH2
oxide(s) ZnO chloride(s) ZnCl2

Radius
ionic radius (2- ion) pm ionic radius (1- ion) pm
atomic radius 134 pm ionic radius (1+ ion) pm
ionic radius (2+ ion) 88 pm ionic radius (3+ ion) pm
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Conductivity
thermal conductivity 116 J/m-sec-deg electrical conductivity 169.033 1/mohm-cm
polarizability 6.4 A^3

Abundance
source Sphalerite (sulfide) rel. abund. solar system 3.100 log
abundance earth's crust 1.79 log cost, pure 3.7 $/100g
cost, bulk 0.12 $/100g
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