Isotopes 5.0 / 5 based on 1 ratingTeacher recommended ? ChemistryIsotopesGCSEEdexcel Created by: Jazzy15Created on: 31-03-19 14:26 What are isotopes ? Are different atomic forms of elements with a different amount of neutrons 1 of 9 What is the mass number ? Protons and neutrons - in the nucleus 2 of 9 What is the atomic number ? It is the number of protons 3 of 9 What is the atomic no. of Sodium (Na) ? 11 4 of 9 What is the mass no. of Sodium (Na) ? 23 5 of 9 How do we find the amount of neutrons in an atom ? Neutrons = mass no. - atomic no. 6 of 9 Isotopes are atoms of an element with the same no. of ? Protons 7 of 9 Isotopes are atoms of an element with a different no. of ? Neutrons 8 of 9 What is meant the Ar (small r ) value ? The atomic weight - relative abundance or percentage of each isotope in a sample of an element 9 of 9
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