thirty 60 / 2 = 30
About 30-35 mph
1
26
Exactly 16
Exactly 18 of them
96 ÷ 2 = 48
214 ÷ 2 = 107
Two will go into forty two twenty one times.
Exactly 18 of them do, with nothing hanging out and no room to spare.
There is only one 2s orbital in an atom.
25 of them