Chemistry › Isotope
Mendeleev · Isotope
Chlorine-35
Chlorine-35: atomic number 17, mass number 35, with 17 protons and 18 neutrons.
IsotopeCl
3517Cl
Protons17
Neutrons18
Electrons (neutral)17
The proton count fixes the element: 17 protons identify Chlorine. Mass number 35 is the total number of protons and neutrons.
A neutral Chlorine-35 atom also has 17 electrons. Changing neutrons changes the isotope; changing electrons changes the charge.