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310.
2000
20 of them.
39
It has 17 of them with a remainder of 1
There is only one 2s orbital in an atom.
25 of them
100 2s for the hundreds digit of 200-30010 2s for the tens digit of 220-23010 2s for the ones digit of 200-300________________________________120 '2s'
unknown
1
36
26
42