Chemistry C1 1.2 0.0 / 5 ? ChemistryGCSEAQA Created by: Bex RobertsCreated on: 31-05-13 12:22 what does an atom conatin? protons & neutrons 1 of 7 what does every atom have the same number of? protons & electrons 2 of 7 what is the atomic number? the number of protons in the nucleus 3 of 7 what is the mass number? the number of protons plus neutrons 4 of 7 if an atom has 4 protons and 5 neutrons, what is the mass number? 4 + 5 = 9 5 of 7 argons atomic number is 18 and mass number is 40, how many electrons? the number of electrons is the same as the number of protons, so 18 6 of 7 how many neutrons does argon then have? 18 (number of protons) + number of neutrons = 40 7 of 7
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