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Atomic Number: 27
Co
Co

Cobalt

58.9330 u

Category

transition metal

State at Room Temperature

solid

Electron Configuration

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁷

Valence Electrons

2

Lewis Dot:••

Electronegativity

1.88

Pauling scale

Oxidation States

+2+3

Melting Point

1768 K

1494.85°C

Boiling Point

3200 K

2926.85°C

Density

8.9

g/cm³

Position in Table

Group 9Period 4d-block

Discovery

Historical Information

Discovered byGeorg Brandt
Year1735

Common Uses

Applications & Industries

Magnets, batteries, blue pigments, superalloys

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