1
One million of them.
200
10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 31, 41, 51, 61, 71, 81, 91 = 19 (1s)
1024 of them.
There are 210.
There r 16 1s. Including the word one.
5 number 1s so far
4
19 of them.
42
1
1s + 1s + 1 = 2s + 1
10,485,760 I do believe.
0.1111111111111111111111111111111111111 (the 1s go on forever)
There are 10 core electrons in fluorine. This includes the electrons in the inner electron shells (1s and 2s) of the fluorine atom.
6