Question

For sodium atom, the number of electrons with m = 0 will be:

• A. 2
• B. 7
• C. 9
• D. 8

Answer 1

The correct option is B 7

$1s^{2}2s^{2}2p^{6}3s^1,m=0$ for 5 electrons in s-orbitals and 2 electrons in p-orbital