A level - chemistry atom basics atomic structure 4.5 / 5 based on 5 ratings ? ChemistryBonding & shapesASAQA Created by: sana sheikhCreated on: 06-09-11 18:33 What 3 particles are atoms made of? Protons, neutrons and electrons 1 of 6 why are atoms neutral even though the have both negative and positive particles? the amount of positive particles and negative particles are equal and cancel eachother out 2 of 6 What is the atomic number? number of protons 3 of 6 what is mass number? number of protons and neutrons 4 of 6 what are isotopes? When the same elements have the same number of protons but different number of neutrons 5 of 6 explain why isotopes have the same chemical properties? They have same number of electrons in outer shell and same electron configuration 6 of 6
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