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EMEQ Vocabulary
Question | Answer |
---|---|
Law of Conservation of Mass | the mass of substances produced (products) by a chemical reaction is always equal to the mass of the reacting substances (reactants) |
Physical change | change in subsitance that only effects physical properties,such as size or shape |
Chemical Change | produces a new substance with different properties than original substince |
Element | substance that can not be broken down into simpler substances |
Chemical formula | a representation of a substance using symbols for its constituent elements |
Element (Diatomic) Molecule | a molecule consisting of only 2 of the same atoms which are covalently bonded together |
Compound molecule | two or more elements that are bonded together |
Chemical equation | a written representation of the process that occurs in a chemical reaction (products on right and reactants on left) |
Chemical reaction | a process in which one or more substances are converted to one or more different substances |
Reactants | The chemical formulas on the that represent the starting substances |
Products | The substances produced by the reaction on the left |
Coefficient | number in front of the equation that tells how many molecules that are (if no coefficient shown, its one) |
Subscript | shows how many atoms of each element there are |