Question

What element is in Group 18 Period 1 ?

Answer 1

1. Helium (He)is the first element of group 18 and the 2nd element of the periodic table.
2. The electronic configuration of Helium is $1{\mathrm{s}}^2$.
3. Noble gases are also known as inert gases and are placed in Period 18.
4. Helium is used in welding metals like Aluminium, also due to its inflammable property, it is used in filling balloons.
5. It is the second most abundant gas in universe.
6. Therefore, Helium is the Group 18 Period 1.