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???? 4 puzzles to solve to review the concept of atoms and the use of the periodic table ✅ proton, neutron, electron, nucleon, ... ▶️ Playlist: COLLEGE ???? CHEMISTRY: • Position, speed and acceleration vector... ???? Chapters 00:00 Exercise 00:18 1) Atomic number of an atom (symbolic notation of the nucleus) 01:20 2) Symbol of an element (atom) 01:58 3) Electrons in an atom 02:35 4) Neutrons in the nucleus