Lulu's Vocab.
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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Law Of Conservation Of Mass. | Nothing can be created or Destroyed, just changed. Product always reactant.
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Physical Change. | A usually reversible change in the physical
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Chemical Formula. | A representation of a substance using symbols for its constituent elements.
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Chemical Change. | A usually irreversible chemical reaction involving the rearrangement of the atoms of one or more substances and a change in their chemical properties or composition, resulting in the formation of at least one new substance.
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Element (Diatomic) Molecule. | Molecules composed only of two atoms, of either the same or different chemical elements.
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Compound Molecule. | The molecule is the smallest unit of a compound.
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Chemical Equation. | A symbolic representation of what happens when chemicals come in contact with one another. A balanced chemical equation shows how many of what molecules react, how many of what molecules result, and sometimes the state of the substances.
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Element. | A pure substance composed of only one type of atom.
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Chemical Reaction. | Interactions in which atoms exchange or share electrons, forming new chemicals.
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Reactants. | A molecule which enters into a chemical reaction.
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Products. | A molecule which is formed as a result of a chemical reaction.
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Coefficient. | A coefficient is a number placed in front of a term in a chemical equation to indicate how many molecules (or atoms) take part in the reaction.
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Subscript. | It is the number of atoms in the preceding element.
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