Question

How many electrons does oxygen have in its outermost shell?

Answer 1

Oxygen has $6$ electrons in outermost orbit.

Electronic configuration of $O_2$ is $1s^{2}2s^{2}2p^4$

where $2s^{2}2p^4$ is outermost electronic configuration.

S orbital $\left(2s^2\right)\to 2$ electrons.

P orbital $\left(2p^4\right)\to 4$ electrons.

Total $6$ electrons in valence shell.