OCR A AS Chemistry Atoms and Reactions 4.5 / 5 based on 3 ratings ? ChemistryReactionsASOCR Created by: laurenCreated on: 23-12-12 17:34 Atoms of the same element with different numbers of neutrons Isotopes 1 of 7 The number of protons in the nucleus of an atom Atomic Number 2 of 7 The number of particles in the nucleus of an atom Mass Number 3 of 7 A positively or negatively charged atom Ion 4 of 7 The mass of an atom of an isotope compared with one twelfth of the mass of an atom of carbon-12 Relative Isotopic Mass 5 of 7 The weighted mean mass of an atom of an element compared with one twelfth of the mass of an atom of carbon-12 Relative Atomic Mass 6 of 7 a reagent that oxidises another species Oxidising Agent 7 of 7
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