Elements 0.0 / 5 ? ChemistryElementsGCSEAQA Created by: AlamoCreated on: 03-11-17 09:43 What is an element? A substance made up of atoms that have the same number of protons in their nucleus 1 of 5 What is an isotope? Isotopes are different forms of an element but have a different number of neutrons 2 of 5 Isotopes have the same atomic number but different what? Mass number 3 of 5 What is the formula to work out the relative atomic mass? Relative atomic mass (Ar) = (isotope abundance x isotope mass number) / sum of abundances of all the isotopes 4 of 5 What can atoms be represented by? A one or two letter symbol 5 of 5
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