9 protons
9
The ion S(2-) has 16 protons and 18 electrons.
17
It has a positive (+) charge.
If there are more electrons than protons, then the ion charge is negative. If there are more protons than elections, then the ion charge is positive.
Consider an atom of oxygen in which the nucleus contains 8 protons and 8 neutrons. If it is doubly ionized, what is the charge of the oxygen ion and how many electrons remain in the ion?
A neutral atom has an equal number of protons and electrons. Protons are positively charged, and electrons are negatively charged. Therefore if you have an ion with a -1 charge, it has one extra electron. So your ion has 85 protons.
The charge on a carbonate ion is -2; therefore, the ion has two more electrons than protons.
The ion S(2-) has 16 protons and 18 electrons.
An ion that has more electrons than protons has a negative charge.
9 protons
A neutral atom has an equal number of protons and electrons. Protons are positively charged, and electrons are negatively charged. Therefore if you have an ion with a -1 charge, it has one extra electron. So your ion has 85 protons.
22
17
35
The number of electrons are required to predict the charge of the ion.
10
2-