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Protactinium

Details of the Chemical Element Protactinium
Element NameProtactinium
SymbolPa
Atomic Number91
GroupRare Earth
Crystal StructureOrthorhombic
Atomic Mass231.03588
Electronic Configuration2,8,18,32,20,9,2
Orbital Configuration[Rn] 5f2 6d1 7s2
Valency4,5
Melting Point1600°C
Boiling Point--
Electo-negativity1.5
Covalent Radius--
Last updated on 12 April 2021 06:26:31
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