In the following table each column represents a neutral atom. Fill in the gaps in the following table by working this problem out on a separate sheet of paper. You will need the periodic table in the "resources" drop down menu in the upper right hand corner of this question to look up atomic numbers.
Symbol 3517Cl
Protons 25 50
Neutrons 30 66
Electrons 49 86
Mass no. 222 119
