Radium (Ra) in the periodic table — PeriodicTable

Radium (Ra) in the periodic tableRadium is element 88, an alkaline earth of the s block, in group 2, period 7. Its ground-state configuration is [Rn] 7s2, and it usually shows the oxidation states 0, 2.It was discovered in 1898, by Curie (Marie and Pierre).Name origin: the Latin radius, 'ray'. Blank rows are columns the sheet does not measure for this element.

Property

Value

Unit

Atomic weight

226

Da

Electronegativity

0.9

First ionisation energy

509.3

kJ/mol

Van der Waals radius

283

pm

Melting point

973

K

Boiling point

2010

K

Density

5.5

g/cm³

Abundance

0

mg/kg

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