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Science Vocab. #1

law of conservation of mass states that the mass of an isolated system (closed to all matter and energy) will remain constant over time.
Physical change any process involving a substance's change from one state (gas, liquid, solid) to another without alteration of the chemical composition;
chemical change any change from one state (gas, liquid, solid) which is accompanied by alteration of the chemical composition;
element one of a class of substances that cannot be separated into simpler substances by chemical means.
chemical formula a representation of a substance using symbols for its constituent elements
element (diatomic) molecule A diatomic molecule is a molecule that is made up of only two atoms. Some common diatomic molecules are Hydrogen, Oxygen, and Nitrogen.
chemical equation is the symbolic representation of a chemical reaction where the reactant entities are given on the left hand side and the product entities on the right hand side.
chemical reaction is a process that leads to the transformation of one set of chemical substances to another.
reactants (in a chemical equation) occurs when chemicals or substances change into one or more other substances.
Products(in a chemical equation) the newly formed chemicals or substances are called products
coefficient (in a chemical equation) The coefficients represent the number of moles of reactants and products.
subscript (in a chemical equation) tell you how many atoms of each element are in the equation.
element molecule it would be like C or H or Cl it will always have a 2 and only 1 element!!!
Created by: M0903480