Periodic table of elements

68 - Erbium [Er]

68: Erbium - Erbium [Er]
Group: 3
Period: 6
Atomic number: 68
Atomic mass: 167.259
Configuration: [Xe] 4f126s2
Atomic radius: 226 pm
Covalent radius: 189 pm
Electron affinity: 50 eV
Ionization energy: 6.1077 eV
Electronic term: 3H6
Mass fraction in the earth crust: 0.000003
Mass fraction in the earth space: 0.000000002
Electronegativity: 1.24

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