38 Sr 87.621

Strontium

ALKALINE EARTH METAL

Phase: Solid

Discovered: William Cruickshank (chemist)

Block: S

Summary

Strontium is a chemical element with symbol Sr and atomic number 38. An alkaline earth metal, strontium is a soft silver-white or yellowish metallic element that is highly reactive chemically. The metal turns yellow when it is exposed to air.

Source: Wikipedia

Physical Properties

Atomic Mass 87.621 u

Density 2.64 g/cm³

Melting Point 1050 K

Boiling Point 1650 K

Molar Heat 26.4 J/(mol·K)

Electron Affinity 5.023 kJ/mol

Ionization Energies

1^st: 549.5 kJ/mol

2^nd: 1064.2 kJ/mol

3^rd: 4138 kJ/mol

4^th: 5500 kJ/mol

5^th: 6910 kJ/mol

6^th: 8760 kJ/mol

7^th: 10230 kJ/mol

8^th: 11800 kJ/mol

9^th: 15600 kJ/mol

10^th: 17100 kJ/mol

11^th: 31270 kJ/mol