Praseodymium (Pr) — Element 59

59 Pr 140.91

Praseodymium

Element 59 · 140.91 u · f-block

lanthanide

A soft, silvery rare earth that gives glass a distinctive green color. Used in magnets and aircraft engines.

Phase (STP)

Solid

Melting Point

935 °C

Boiling Point

3520 °C

Density

6.773 g/cm³

Electronegativity

1.13

Atomic Radius

185 pm

Ionization Energy

527 kJ/mol

Electron Affinity

93 kJ/mol

Discovered

1885 · Carl Auer von Welsbach

Electron Configuration

[Xe] 4f3 6s2