What is the chemical symbol for 1s^22s^22p^6

The chemical symbol of given electronic configuration is Ne.

Explanation:

First of all we will calculate the total number of electron from this electronic configuration:

1s² 2s² 2p⁶ = 2+2+6 = 10

we know that the number of electron of an atom shows its atomic number. The total number of electron in given electronic configuration are 10.

Now from periodic table we got to know that neon has atomic number of 10.

Thus the given electronic configuration is of neon atom.

Neon is belongs to noble gas family.

All noble gases have complete octet.

These are inert gases.