Question

What is the electronic configuration of oxygen [Atomic no.=8, Atomic mass=16]?

• A. $2,3$
• B. $2,4$
• C. $2,5$
• D. $2,6$

Answer 1

The correct option is D $2,6$

Atomic number of oxygen is $8$. K shell can accommodate $2$ electrons and L shell can accommodate the remaining $6$ electrons. Hence the electronic configuration is $2,6.$