Chemistry All about atoms/isotopes and ions 4.0 / 5 based on 5 ratings ? ChemistryOtherAll boards Created by: imogenCreated on: 29-04-09 18:18 What is an isotope? atoms of the same element 1 of 6 How do work out the mass number? number of protons + number of neutrons 2 of 6 how many electrons does the first shell hold? 2 3 of 6 what is the realitive mass of a neutron? 1 4 of 6 what are atoms which loose electrons called? cations 5 of 6 what are atoms which gain electrons called? anions 6 of 6
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