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5 Cards in this Set
- Front
- Back
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Atom |
is the smallest unit of matter that cannot be broken down by chemical means. |
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Element |
is a pure substance made of only one kind of atom. |
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Compound |
is a substance made of the joined atoms of two or more different elements. |
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Molecule |
is a group of atoms held together by covalent bonds. |
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Ion |
is an atom or molecule that has gained or lost one or more electrons. |
