Question

How many electrons in argon have m=0

Answer 1

0 electron if m is 0

Answer 2

Explanation:

Atomic number of argon is 18 and its electronic configuration is $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}$.

It is given that magnetic quantum number, that is, m = 0. Also value of m ranges from +l to -l. Thus, if m = 0, then azimuthal quantum number (l) = 0.

As l ranges from 0 to n-1, where n denotes the shell. When l = 0 then shell is s, when l = 1, then shell is p, and so on.

Since, m = 0, so l = 0 this means that n = s shell.

Therefore, in an argon atom there are two electrons each in 2s and 3s shell. That is, there are total 4 electrons in s shell of argon atom when m = 0.