So although chlorine has a mass number of 35 which means ... A = 64 Number of neutrons N = 64 - 30 = 34 Since this is a nucleus there are no electrons There are 30 protons and 34 neutrons.

The reaction releases a lot of heat as the ionic compound sodium chloride is formed. A sodium and chlorine atom are near each other. An electron from each atom feels the attraction from the other atom ...

But remember, there are no electrons inside the nucleus. This is the chemical symbol for chlorine, written with its mass number and atomic number. Calculate the number of protons, neutrons and ...

The following quote from a revision guide seems to confirm this: "... chlorine is less reactive than fluorine because the outer electrons in a chlorine atom are further from the nucleus than the outer ...