Helium (He)

A colorless, odorless, tasteless, non-toxic, inert, monatomic gas.

It was discovered on the Sun before it was found on Earth.

Element properties

Atomic number
2
Symbol
He
Atomic mass
4.0026 u
Category
Noble Gas
Period
1
Group
18
Block
p
State
Gas
Electron configuration
1s2
Electronegativity (Pauling)
Not available
Density
0.0001786 g/cm³
Melting point
-272.2 °C
Boiling point
-268.9 °C

Uses