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89Ac

Actinium

악티늄 · アクチニウム

Actinide

Atomic number89
ElementAcActinium
Atomic mass227
CategoryActinide
Group3
Period7
Electron config[Rn] 6d1 7s2
Shells2,8,18,32,18,9,2
State (RT)Solid
Melting pt1050°C
Boiling pt3200°C
Electronegativity1.1
Discovered1899
Main usesNeutron sources, research
Ac89
2 · 8 · 18 · 32 · 18 · 9 · 2
Bohr model

Group 3