Fill in the blanks using the following terms: atom, element, ion, isotope, molecule, compound. a. A substance which cannot be broken down into simpler substances by ordinary chemical means: b. The basic particle which makes up an element: c. A substance formed when two or more different elements combine: d. Basic particle of a compound; combination of two or more atoms, either the same or different: e An atom of an element which has the same number of protons, but a different number of neutrons from the other atoms of the element: f. An atom (or group of atoms) which has a charge, either positive or negative: thanks

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Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.