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subatomic particles
particles found in atoms; particles that make up atoms and are smaller than atoms
reactants
substances that go into a chemical reaction; the starting substances
products
substances that go out of a chemical reaction; the ending substances
electronegative
a chemical property that describes an atom’s tendencey to attract electrons to itself
element
a pure substances made of only one kind of atoms; arganized on the periodic table
molecule
a substances made of more than one element, chemically combined such as H2O
polar molecule
a molecule in which the bonds between atoms do not equally pull electrons, resulting in partial + and - charges on the molecule