Question

Which element has?

Two shells, both of which are completely filled with electrons?

Answer 1

Noble gas:

• Noble gases belong to Group-$18$.
• The stability of noble gases is very high.
• Noble gases exhibit stable electronic configuration due to the completely filled orbitals.
• They are fairly non-reactive gases.
• The general electronic configuration of Noble gas is $\mathrm{n}{s}^2\mathrm{n}{p}^6$.

Neon $\left(\mathrm{Ne}\right)$:

• The noble gas that has two shells and both of which are completely filled with electrons is Neon.
• The distribution of electrons per shell are $2,8$.
• The atomic number of Neon is $10$.
• The electronic configuration of Neon is $1s^{2}2s^{2}2p^6$.