Element Rubidium (Rb)

Atomic number 37 · alkali metal · Atomic mass 85.468 u

Atomic Mass
85.4680 u
Element Properties
Atomic Number 37
Atomic Mass 85.4680 u
Category alkali metal / 碱金属
Group 1
Period 5
Block S
Electron Configuration [Kr] 5s¹
Electronegativity (Pauling) 0.82
Phase at STP Solid
Density 1.532 g/cm³
Year Discovered 1861

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