There are 50 instances of the number 2 in the numbers from 1 to 100. This includes the two in the tens place for the numbers 20 through 29 (10 times) and the individual 2s in the units place for every decade (2, 12, 22, 32, 42, 52, 62, 72, 82, 92), which adds another 10 instances. Therefore, the total is 20 occurrences of the digit 2.
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'
Seven of them.
There is only one 2s orbital in an atom.
.2s
25 of them
310.
2000
unknown
39
36
1
26