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???? Quiz to revise and prepare for a test ✅ atom, ion, proton, neutron, electron, molecules, formula, symbol ???? VIDEOS ON THE SAME THEME ???? ▶️ Why is an ion charged? 3rd grade course • Why is an ion charged? Tro... ????Cycle 4 program (5th, 4th, 3rd): → Concepts of molecules, atoms, ions. 0:00 QUIZ 10 QUESTIONS 0:19 A positively charged B electrically neutral 1:05 B positively charged negatively charged 1:28 B lost an electron gained a proton 2:14 B fewer electrons than a fluorine atom 2:35 A the hydroxide molecule B the hydroxide ion