Exam (elaborations)
Atomic structure: Atomic structure and the periodic table: Chemstry: GCSE (9:1)
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Relative mass of a proton 1 . Relative mass of a neutron about the same as that of a proton Relative mass of an electron 1/1840 Relative charge of a proton +1 Relative charge of a neutron 0 Relative charge of an electron -1 Neutral atoms same number of positive protons as negative electrons Atomic (proton) number the number of protons in the nucleus of an atom
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atomic structure atomic structure and the periodi
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