Protactinium

Element information

Atomic properties

Mass: 231.0359 u

Electron configuration: [Rn]7s2 5f2 6d1

Oxidation states: +5, +4

Electronegativity: 1.5

Physical properties

Density: 15.37 g/cm³

Standard state: solid

Melting point: 1845 K

Boiling point: - K

₉₁Pa

Part of the Periodic Table 2 collection

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