La

Lanthanum

Atomic Number 57 · Metal piece

The first of the lanthanide series. Used in camera lenses, battery electrodes, and lighter flints.

Atomic Mass

138.91 u

Category

Lanthanide

Phase (STP)

Solid

Density

6.145 g/cm³

Melting Point

920 °C

Boiling Point

3464 °C

Electronegativity

1.1 (Pauling)

Atomic Radius

195 pm

Electron Configuration

[Xe] 5d1 6s2

Discovered

1839 — Carl Gustaf Mosander

Find Lanthanum Samples

Sample form: Metal piece

Luciteria Science

Premium element samples in acrylic cubes

Engineered Labs

Element collections and periodic table displays

Various element samples and collections

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