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EMEQ Vocabulary
science vocabulary
Question | Answer |
---|---|
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. |