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Lulu's Vocab.
| Question | Answer |
|---|---|
| Law Of Conservation Of Mass. | Nothing can be created or Destroyed, just changed. Product always reactant. |
| Physical Change. | A usually reversible change in the physical |
| Chemical Formula. | A representation of a substance using symbols for its constituent elements. |
| 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. |
| Element (Diatomic) Molecule. | Molecules composed only of two atoms, of either the same or different chemical elements. |
| Compound Molecule. | The molecule is the smallest unit of a compound. |
| 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. |
| Element. | A pure substance composed of only one type of atom. |
| Chemical Reaction. | Interactions in which atoms exchange or share electrons, forming new chemicals. |
| Reactants. | A molecule which enters into a chemical reaction. |
| Products. | A molecule which is formed as a result of a chemical reaction. |
| 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. |
| Subscript. | It is the number of atoms in the preceding element. |
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