88

Radioactive

Ra

Radium

(226)

Alkaline Earth
Solid

Discovery

Curie, Marie & Pierre (1898)

Etymology

Latin via French

Meaning

Ray

Electron configuration

Electron configuration

Crystal structure

Crystal structure

Body-centered cubic

Physical Properties

Phase

  (at 21 °C and 101.325 kPa)

Solid

Melting point

  (at 101.325 kPa)

700.0 °C

973.15 K

Boiling point

  (at 101.325 kPa)

677.0 °C

950.15 K

Density

  (at 21 °C and 101.325 kPa)

5.50 g/cm3

Electronegativity

0.90