1. Neutron A. The number of protons in an atom. 2. Proton B. Hold the electrons around the nucleus. 3. Electron C. The number of protons plus neutrons. - ppt download
Displaying Isotopic Abundance Percentages with Bar Charts and Pie Charts | The Chemical Statistician
Nuclei of Atoms
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chapter 5 (edition 4 of Bennett et al.)
Atomic number, mass number, and isotopes (video) | Khan Academy
Atomic Number : Definition, Symbol, Representation ~ ChemistryGod