5 goes into 188 37.6 times. (37 times with a remainder of 3.)
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.
90
20
10
75
24
7
i think there are 18 digit 5s.
66 of them.
103.4
Traditionally, 199