Question

In Ca atom how many electrons contains m=0 ?

Answer 1

Answer:

Zero(0)

Explanation:

the atomic numer of Ca is 20

Its configuration

1s2 2s2 2p6 3s2 3p6 4s2

​So in 2p6 4 electrons would not have m = 0

And in 3p6 4 more electrons not having m = 0

So totally 8 not having m = 0

So 12 electrons have m = 0