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???? Mass of an atom, nucleus of an atom, nucleons, electrons ✅ Course reminders + Application exercise ▶️ Playlist: CHEMISTRY ???? Second: • How to CALCULATE: proton, neutron and... ???? Chapters 00:00 Intro 00:17 The mass of an atom 01:35 Application exercise ???? Second program 2nd: → conventional writing of the nucleus of an atom → Compare the size and mass of an atom and its nucleus.