Actinium

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Actinium
General Info
Atomic Symbol	Ac
Atomic Number	89
Atomic Weight	?.?? g/molwarning.png“?.?? g/mol” is no number.
Chemical series
Appearance
Group, Period, Block
Electron configuration
Electrons per shell
CAS number
Physical properties
Phase
Density	g/cm3
Melting point	warning.png“” is no number.
Boiling point	warning.png“” is no number.
Isotopes of Actinium
iso NA half-life DT DE (MeV) DP is stable with neutrons.
All properties are for STP unless otherwise stated.

Actinium is the 89th element.

See Also

• Periodic Table of Elements
• Elements
• Atoms
• Chemistry