ELECTRON - A tiny, negatively charged particle that orbits an atom’s nucleus., PROTON - A positively charged particle found inside every atomic nucleus., NEUTRON - A neutral particle in the nucleus that helps stabilize atoms., VALENCE SHELL - The outermost energy level of an atom where bonding electrons reside., CATION - An ion that has lost electrons and carries a positive charge., ANION - An ion that has gained electrons and carries a negative charge., ATOM - The smallest unit of an element that still retains its chemical identity., MOLECULE - Two or more atoms chemically bonded together., COMPOUND - A substance formed when two or more different elements combine in fixed ratios., ELEMENT - A pure chemical substance made of only one kind of atom.,

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