Atom - Smallest particle of an element that takes part in a chemical reaction, Proton - Positively charged particles found in the nucleus of an atom, Subatomic particles - Particles that make up an atom, Electrons - Negativity charged particles found in shells of an atom, Core electrons - Electrons located in the inner shells, Lone pairs - Electrons pairs not involved in bonding, Valence electrons - Electrons found in the outermost shell, Valency - Combining power of an atom, Bonding electrons pair - Electrons involved in bonding of atoms, Energy level - The probable location where electrons have higher chances of being found,

Atomic structure: Describe an atom and it's structure

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