strontium

| Introduction | History | Other Periodic Tables | Back |

Symbol:

Sr

Atomic Number:

38

Relative Atomic Mass:

87.62 g mol^-1

Natural Abundance in Lithosphere, hydrosphere and atmosphere:

0.01% (mass fraction)

Electron Configuration:

[Kr]5s²

Oxidation States:

II

Atomic Radius:

215.1pm

Covalent Radius:

191pm

Ionic Radius:

118pm (for +2 oxidation state, 6 coordinate)

126pm (for +2 oxidation state, 8 coordinate)

Melting Point:

769°C

Density:

2.63 g cm^-3 (at 20°C)

First Ionisation Energy:

5.695 eV

Reduction Potential:

-2.89V

for Sr²⁺ + 2e^- a Sr_(s)

Electronegativity (Allred and Rochow):

1.0

Number of Natural Isotopes:

4

Mass Number of the Most Abundant Isotopes:

86 g mol^-1 a 9.9% abundance

87 g mol^-1 a 7.0% abundance

88 g mol^-1 a 82.6% abundance