38
Sr
strontium
87.62

General properties

Group
group 2 (alkaline metals)
Period
period 5
Category
alkaline earth metals
Standard atomic weight
87.62(1)
Melting point
1050 K (777 °C)
Boiling point
1650 K (1377 °C)
Phase at STP
solid

Additional properties

Block
s-block
Electron configuration
[Kr] 5s²
Electrons per shell
2, 8, 18, 8, 2
Electronegativity
0.95
Density
2.64 g/cm³
Oxidation states
+1, +2 (a strongly basic oxide)
CAS Number
7440-24-6