Element Strontium (Sr)

Atomic number 38 · alkaline earth · Atomic mass 87.62 u

Atomic Mass
87.6200 u
Element Properties
Atomic Number 38
Atomic Mass 87.6200 u
Category alkaline earth / 碱土金属
Group 2
Period 5
Block S
Electron Configuration [Kr] 5s²
Electronegativity (Pauling) 0.95
Phase at STP Solid
Density 2.64 g/cm³
Year Discovered 1790

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