He

Helium

Atomic Number 2 · Gas cylinder

Second lightest element in the universe. An inert noble gas used in cryogenics, MRI machines, and party balloons.

Atomic Mass

4.0026 u

Category

Noble Gas

Phase (STP)

Gas

Density

0.0001785 g/cm³

Melting Point

N/A

Boiling Point

-268.93 °C

Atomic Radius

31 pm

Electron Configuration

1s2

Discovered

1868 — Pierre Janssen

Find Helium Samples

Sample form: Gas cylinder

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