21 5s
In the Rb atom, the electron configuration is [Kr]5s^1. This means there is 1 electron in the 5s sublevel of the Rb atom.
7
20
75
90
10
i think there are 18 digit 5s.
245 inches is 622.3 centimeters.
12
The answer would be 7,000
Exactly 33 of them