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Element. Molecule. Can be just one element Can be just one atom Can be 2 or more elements Written as Chemical Formula H 2 H 2 O C 6 H 12 O 6 Nitrogen He 8 CaCl Purest Form Cannot be broken down. Compound.
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Element Molecule Can be just one element Can be just one atom Can be 2 or more elements Written as Chemical Formula H2 H2O C6H12O6 Nitrogen He8 CaCl Purest Form Cannot be broken down Compound