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Atomic Number: 111
Rg
Rg

Roentgenium

282.0000 u

Category

transition metal

State at Room Temperature

solid

Electron Configuration

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f¹⁴ 6d⁹

Valence Electrons

2

Lewis Dot:••

Oxidation States

+3

Density

28.7

g/cm³

Position in Table

Group 11Period 7d-block

Discovery

Historical Information

Discovered bySigurd Hofmann and team
Year1994

Common Uses

Applications & Industries

Research in nuclear chemistry

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