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Roentgenium (Rg)
Atomic number: 111 · Category: unknown, probably transition metal · Group 11 · Period 7 · Phase: Solid
Roentgenium is a chemical element with symbol Rg and atomic number 111. It is an extremely radioactive synthetic element (an element that can be created in a laboratory but is not found in nature); the most stable known isotope, roentgenium-282, has a half-life of 2.1 minutes. Roentgenium was first created in 1994 by the GSI Helmholtz Centre for Heavy Ion Research near Darmstadt, Germany.
Block: d
Electronic structure
Electron configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d9
Configuration (semantic): *[Rn] 5f14 6d10 7s1
Shells: 2, 8, 18, 32, 32, 17, 2
Electron affinity: 151
Periodic position
Group: 11
Period: 7
xpos: 11
ypos: 7
Spectral/Bohr images
Image
3D Model