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EMEQ Vocabulary

science vocabulary

QuestionAnswer
Law of Conservation of Mass a fundamental principle of classical physics that matter cannot be created or destroyed in an isolated system
Physical Change a usually reversible change in the physical properties of a substance, as size or shape
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 substance that cannot be broken down into simpler sbstances
Chemical Formula a representation of a substance using symbols for its constituent elements
Element (Diatomic) Molecule a molecule Made up of two atoms
Compound Molecule A molecule that has more than 1 element.
Chemical Equation shorthand form for writing what reactants are used and what products are formed in a chemical reaction; sometimes shows whether energy is produced or absorbed.
Chemical Reaction process that produces chemical change, resulting in new substances that have properties different from those of the original substances.
Reactants (of a chemical equation) substance that exists before a chemical reaction begins.
Products (of a chemical equation) substance that formms as a result of a chemical reaction
Coefficient (in a chemical equation) The number of molecules that is the number that is on the left side of the molecule
Subscript (in a chemical equation) the nmber of atoms of each element on a molecule.
Created by: Gloria Nunez
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