24 of them
none duh if you said there is one you are either very dumb or very smart
how many 3s gointoo 33
28 3s
its clearly 8 3 6 9 12 15 18 21 4
The are two electrons in the 3s orbital of magnesium (Mg.)
How many 3s are in 15
It is 17/24 = 0.708333... where the 3s are repeating.
37.6666667
9
4
16