To determine how many 5's are in 600, we need to consider the place value of the digit 5. In the number 600, the 5 is in the tens place. Therefore, there is only one 5 in 600.
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