Discovered By: Adair Crawford, Humphry Davy
Discovery year: 1790

The following table showing some properties of Strontium(Sr):

Table Example
Atomic number 38
Group 2
Period 5
Block s
Electrons 38
Protons 38
Neutrons 50
Atomic weight 87.62
Oxidation states +2
Ionic charge Sr^2+


Table Example
Electrons per shell K2 L8 M18 N8 O2
Electron configuration 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2
Atomic radius 219 pm
Covalent radius 195 pm
Boiling point 1382°C
Melting point 777°C
Phase Solid
Fusion heat 8 kJ.mol^-1
Vaporization heat 137 kJ.mol^-1
Color Silver


Table Example
Density 2630 kg.m^-3
Liquid density 2375 kg.m^-3
Mohs hardness 1.5
Molar volume 3.332*10^-5 m^3.mol^-1
Poisson ratio 0.28
Shear modulus 6.1 GPa
Thermal conductivity 35 W.m^-1.K^-1
Electrical type Conductor
Magnetic type Paramagnetic
Resistivity 1.3*10^-7 Ohm.m


Table Example
Electronegativity 0.95
Valence 2
Electron affinity 5.03 kJ.mol^-1
First ionization energy 549.5 kJ.mol^-1
Radioactive No
Neutron cross section 1.2 barn
Volume magnetic susceptibility 3.47*10^-6
Mass magnetic susceptibility 1.32*10^-9 m^3.kg^-1
Molar magnetic susceptibility 1.16*10^-10 m^3.mol^-1
Electric conductivity 7.7*10^6 S.m^-1