Periodic table of elements

69 - Thulium [Tm]

69: Thulium - Thulium [Tm]
Group: 3
Period: 6
Atomic number: 69
Atomic mass: 168.93421
Configuration: [Xe] 4f136s2
Atomic radius: 222 pm
Covalent radius: 190 pm
Electron affinity: 50 eV
Ionization energy: 6.1843 eV
Electronic term: 2F7/2
Mass fraction in the earth crust: 0.00000045
Mass fraction in the earth space: 0.0000000001
Electronegativity: 1.25

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