Periodic table of the elements
RubidiumStrontiumYttrium
38
Sr
Strontium
87.62
2
8
18
8
2
38
Sr
Strontium
87.62
2
8
18
8
2
General
NameStrontium
SymbolSr
Number38
Chemical seriesAlkaline earth metals
Group / Period2 / 5
Blocks-block
CAS registry number7440-24-6

Physical properties
Statesolid
Density2.64 g/cm3
Melting point1050 K (777°C, 1431°F)
Boiling point1655 K (1382°C, 2520°F)
Critical point

Atomic properties
Atomic Weight87.62 g/mol
Crystal structurecubic face centered
Electronegativity0.95
Atomic radius200 pm
Atomic radius (calculated)219 pm
Electron configuration[Kr] 5s2
Electrons per shell2, 8, 18, 8, 2
Number of protons38
Number of neutrons50

Other languages
SpanishEstroncio
PortugueseEstróncio
FrenchStrontium
GermanStrontium
ItalianStronzio
RussianСтронций
PolishStront
Chinese
Arabicسترونتيوم
TurkishStronsiyum
DutchStrontium


Periodic table of the elements
RubidiumStrontiumYttrium