Category
actinide
State at Room Temperature
solid
Electron Configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f⁷
Valence Electrons
2
Lewis Dot:••
Electronegativity
1.13
Pauling scale
Oxidation States
+3+4+5+6
Melting Point
1449 K
1175.85°C
Boiling Point
2880 K
2606.85°C
Density
12
g/cm³
Position in Table
Group Period 7f-block
Discovery
Historical Information
Discovered byGlenn T. Seaborg, Ralph A. James, Leon O. Morgan, Albert Ghiorso
Year1944
Common Uses
Applications & Industries
Smoke detectors, gamma radiography, neutron sources
Related Elements
Same group or period
Related Calculators
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