Zinc at Chemical Elements.com 

 

Basic Information


Name: Zinc
Symbol: Zn
Atomic Number: 30
Atomic Mass: 65.39 amu
Melting Point: 419.58 °C (692.73 °K, 787.24396 °F)
Boiling Point: 907.0 °C (1180.15 °K, 1664.6 °F)
Number of Protons/Electrons: 30
Number of Neutrons: 35
Classification: Transition Metal
Crystal Structure: Hexagonal
Density @ 293 K: 7.133 g/cm3
Color: bluish


Atomic Structure

[Bohr Model of Zinc]  
Number of Energy Levels: 4

    First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 18
    Fourth Energy Level: 2

Isotopes

Isotope Half Life
Zn-62 9.26 hours
Zn-63 38.5 minutes
Zn-64 Stable
Zn-65 243.8 days
Zn-66 Stable
Zn-67 Stable
Zn-68 Stable
Zn-69m 13.76 hours
Zn-70 Stable
Zn-72 46.5 hours

Facts


Date of Discovery: 1746
Discoverer: Andreas Marggraf
Name Origin: From the German word zin (meaning tin)
Uses: metal coating, rust protection, brass, bronze, nickel
Obtained From: zinc blende, calamine