elements 0.0 / 5 ? ChemistryelementsGCSENone Created by: simmyg123Created on: 03-04-19 11:41 the number of what decides what type of atom it is? number of protons 1 of 7 an atom with one proton in its nucleus is h....... hydrogen 2 of 7 an atom with 2 protons in its nucleus is h..... helium 3 of 7 what is it called if a substance only contains 1 type of atom in it? element 4 of 7 how do you find the number of protons and neutrons in an atom? mass number 5 of 7 how do u find the number of protons in an atom? its the atomic number 6 of 7 how do you find the number of neutrons in an atom? mass-atomic=neutrons 7 of 7
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