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Miriam's Chem. Stack

Law of Conservation of Mass Nothing is ever created or destroyed, only changed. Product always = Reactants.
Physical Change Affects only physical properties, such as its size and shape, or whether it is a solid, liquid, or gas.
Chemical Change Produce new substances that have properties different from those of the original substance, E.x: burning or rust on a bike's handlebars.
Element Substance that cannot be broken down into simpler substances.
Chemical Formula A combination of chemical symbols and numbers to represent a substance.
Element 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 Shorthand form for writing what reactants are Used and what products are formed in a chemical reaction.
Chemical Reaction Process that produces chemical change, resulting in new substances that have properties different from those of the original substances.
Reactants Substance that exists before a chemical reaction begins.
Products Substance that forms as a result of a chemical reaction.
Coefficient Indicates the number of molecules of reactants or products.
Subscript Numbers used to tell you how many atoms of an element are present in the equation.
Created by: I0811157