Exam (elaborations)
Chemistry Paper 1 AQA A-Level Revision Questions and Answers
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Proton Mass 1 Proton Charge +1 Neutron Mass 1 Neutron Charge 0 Electron Mass 1/1840 Electron Charge -1 Atomic Number number of protons in the nucleus of an atom Mass Number number of protons and neutrons in the nucleus of an atom Isotopes atoms of the same element with a different number of...
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