Question

A chlorine atom has 17 protons and 17 electrons. How many protons and electrons make up a chlorine ion of -1 charge?

17 protons, 17 electrons
17 protons, 16 electrons
17 protons, 18 electrons
16 protons, 17 electrons

Answer 1

17 protons make up a chlorine ion

Answer 2

17 protons, 18 electrons.

a -1 charge means there is an extra electron. if it was +1 charge there would be 16 electrons