Question

Question #7701f

Answer 1

10

Explanation:

In a neutral atom, where charge is zero, the number of protons is equal to the number of electrons. Since the charge of one electron is (-1) and of one proton is (+1) so their number should be equal so that the charge will balance out

`rarr` number of electron in a neutral fluorine atom is equal to number of protons in a neutral atom
`"number of protons"="number of electron"=9`

Since in your example the fluorine atom is not neutral, and has a charge of -1, then there is one extra electron that gave the atom the charge,
`rarr "number of electrons" = "number of protons" + 1= 9+1= 10`