Europium (Eu) — Element 63

63 Eu 151.96

Europium

Element 63 · 151.96 u · f-block

lanthanide

The most reactive rare earth element. Creates red and blue phosphors in TVs and is used in euro banknote anti-forgery marks.

Phase (STP)

Solid

Melting Point

826 °C

Boiling Point

1529 °C

Density

5.243 g/cm³

Electronegativity

1.2

Atomic Radius

185 pm

Ionization Energy

547 kJ/mol

Electron Affinity

11 kJ/mol

Discovered

1901 · Eugene-Anatole Demarcay

Electron Configuration

[Xe] 4f7 6s2