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Lulu's Vocab.

QuestionAnswer
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.
Created by: a0409868