Question

What is the electron configuration of oxygen?

Answer 1

See below:

Explanation:

Oxygen:
Atomic no. = 8
`=> 1s^2 2s^2 2p^4`
Now, we can also find:
Period :- 2
Group :-`VIA`
Valency :- `6 - 8 = -2`
Block :- P - block
This also helps to plot the elements in the periodic table.
Hope that helped...!