Exactly 18 of them
Exactly 18 of them do, with nothing hanging out and no room to spare.
1
26
Exactly 16
how 2s go into 324?
96 ÷ 2 = 48
214 ÷ 2 = 107
thirty 60 / 2 = 30
Two will go into forty two twenty one times.
There is only one 2s orbital in an atom.
25 of them