He
Helium
Atomic number: 2Mass: 4.0026 uCategory: Noble Gas
About Helium
Helium is a colourless, odourless, tasteless, non-toxic, inert monatomic gas. It is the first noble gas and the second lightest element. Helium has the lowest boiling point of all elements.
Properties
Period
1
Group
18
Block
P
Category
Noble Gas
Electronegativity
N/A
Ionization Energy
2372 kJ/mol
Melting Point
Unknown
Boiling Point
4 K (-269°C)
Density
0.178 g/L
Oxidation States
None
Electron Configuration
1s²
1s²
Shell 1:2e⁻
Real-World Uses
Weather balloons
MRI machines
Party balloons
Cryogenics
Airships
Fun Fact
Helium was discovered in the Sun before it was found on Earth — its name comes from Helios, the Greek god of the Sun.