The number is 1 more than the number of protons.
One more than the neutral atom (or radical).
The chloride ion has 18 electrons.
A chloride ion has 18 electrons, giving it a valence of -1.
1
Na+ sodium ion has 11 protons, 12 neutrons and 10 electrons
Iodine atom has 7 valence electrons, whereas Iodide ion has 8 valence electrons.
Potassium ion has 18 electrons.
The chloride ion has 18 electrons.
A chlorine ion is monatomic ― it is just Cl-.
Chlorine will not for Cl-7 ion. It will form Cl-1 ion, which has total of 18 electrons.
18
10
Na+ sodium ion has 11 protons, 12 neutrons and 10 electrons
Iodine atom has 7 valence electrons, whereas Iodide ion has 8 valence electrons.
There are 18 electrons in a chloride ion.
a cuprous ion has 28 electrons.
The ion Fr+ has 86 electrons.
17