Smallest unit of an element which is still has the properties of

Small units that cannot be seen. Made of chemically combined atoms

atoms of two or more elements react with each other to create a new substance

substances that cannot be chemically broken down to make them simpler

an atom that has gained or lost at least one electron

atoms of the same element that differ in their number in the number of neutrons

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chemistry

Term	Definition
Atoms	Smallest unit of an element which is still has the properties of
Molecules	Small units that cannot be seen. Made of chemically combined atoms
Compounds	atoms of two or more elements react with each other to create a new substance
Element	substances that cannot be chemically broken down to make them simpler
ion	an atom that has gained or lost at least one electron
isotope	atoms of the same element that differ in their number in the number of neutrons