What Is The Mass Number Of An Atom With 17 Protons 17 Electrons And 18 Neutrons?

What Is The Mass Number Of An Atom With 17 Protons 17 Electrons And 18 Neutrons? An element with 17 protons will always be chlorine. However an element’s mass numbers can vary, which means that it can have different numbers of neutrons. So although chlorine has a mass number of 35 which means it has