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Zinc

Chemical, physical and material properties and data of the chemical element Zinc.


Contents


Zinc

 

General Information about Zinc

Regular nameZincChemical symbolZnOther namesHistorical namesName meaning, originDiscovery (year)OccurencePosition in the PSEGroup membership

 

Atomar Properties of Zinc

Atomic number Z30 = number of protonsStandard Atomic Weight65.38 (2)

 

Electron configuration of Zinc

1s2s2p3s3p3d4s4p4d4f5s5p5d5f6s6p6d6f7s7p
22626102

Shorthand electron configuration of Zinc: [Ar] 3d10 4s2 .

 

Ionization Energies of Zinc

The following table lists the ionization energies IE (ionization potentials); the IE is the energy required in electron volt (eV) per atom to separate a given electron from an Zinc atom.

IE1IE2IE3IE4IE5IE6IE7IE8
9.39419917.9643939.723359.5782.6108134174

 

Isotopic Data of Zinc

An overview of the nuclides as well as the isotopic data and properties are listed on the following page: Zinc isotopes.

 

Chemistry of Zinc

 

Oxidation states+2Electronegativity1.6 (Pauling original)
1.65 (Pauling)
1.59 (Allen)
1.86 (Sanderson)
1.66 (Allred-Rochow)
4.1332 eV (Gosh Gupta)
4.45 eV (Pearson)
Electron affinity-0.6(2) eV
-58(20) kJ mol-1

 

Standard Electrode Potential

E0 (V)SymbolNoxName Ox.
Name Red.
Ox.
Red.
e-
-1.260Zn+ II
0
Zinc(II) oxide
Zinc
ZnO + H2O
⇄ Zn + 2 OH-
+ 2 e-
-1.249Zn+ II
0
Zinc(II) hydroxide
Zinc
Zn(OH)2
⇄ Zn + 2 OH-
+ 2 e-
-1.199Zn+ II
0
Tetrahydroxyzincate
Zinc
Zn(OH)42-
⇄ Zn (s) + 4 OH-
+ 2 e-
-0.7628Zn+ II
0
Zinc(II) cation
Zinc
Zn2+
⇄ Zn (Amalgam)
+ 2 e-
-0.7618Zn+ II
0
Zinc(II) cation
Zinc
Zn2+
⇄ Zn (s)
+ 2 e-

 

Material and Physical Properties

Melting point419.527 °CEnthalpy of fusion (molar)7.32 kJ mol-1Boiling point907 °CEnthalpy of vaporization115.3 kJ mol-1Density7.14 g cm-3

 

External Data, Identifiers

CAS registry number7440-66-6InChI =1S/ZnInChIKeyHCHKCACWOHOZIP-UHFFFAOYSA-NPubChem ID23994

 


More Chemistry

isotopes

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Last update: 2022-12-12


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