37Rb
Rubidium
루비듐 · ルビジウム
Alkali metal
Atomic number37
ElementRb — Rubidium
Atomic mass85.468
CategoryAlkali metal
Group1
Period5
Electron config[Kr] 5s1
Shells2,8,18,8,1
State (RT)Solid
Melting pt39°C
Boiling pt688°C
Electronegativity0.82
Discovered1861
Main usesAtomic clocks, research
2 · 8 · 18 · 8 · 1