Radium

A radioactive element of the alkaline earth metals. White in colour and properties close to barium.

Symbol

Ra

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Atomic number	88		Clip
Atomic / Molecular Weight	226.0254	gmol-1	Clip
Density	5000	kgm-3	Clip
Lattice constant	515	fm	Clip
Melting Point	973	K	Clip
Boiling Point	1773	K	Clip
Specific heat capacity	121	Jkg-1K-1	Clip

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See also: Barium, Periodic Table.