Contents
Key Stage 2
Meaning
Key Stage 3
Meaning
Helium is a Noble Gas with 2 protons in the nucleus.
About Helium
- Helium has the chemical formula He.
- Helium is inert.
- Helium is a gas at room temperature.
- Helium gas is less dense than air.
- An atom of Helium has two electrons in its outer shell.
Key Stage 4
Meaning
Helium is a Noble Gas with 2 protons in the nucleus.