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Define: Laws of Conservation of Mass Nothing is ever created or destroyed, only changed.
Define: Physical Change (Dictionary.com) A usually reversible change in the physical properties of a substance, as a size or shape.
Define: Chemical Change (Dictionary.com) A usually irreversible chemical reaction involving the rearrangement of the atoms or one or more substances and a change in their chemical properties and composition resulting in the formation of at least one new substance.
Define: Element Substance that cannot be broken down into simpler substances.
Define: Chemical Formula (Dictionary.com) A representation of a substance using symbols for its constituent elements.
Define: Element Molecule (Diatomic) Molecule of only one type of atom.
Define: Chemical Equation Shorthand form for writing what reactions are used and what products are formed in a chemical reaction. Sometimes shows whether energy in produced or absorbed.
Define: Reactant (In a chemical equation) Substances that go through a chemical change or a substance that exist before a chemical reaction begins.
Define: Products (In a chemical equation) Substances that result from a chemical reaction.
Define: Coefficient (In a chemical equation) (www.visionlearning.com) The coefficient is the number in front of a molecule symbol.
Define: Subscript (In a chemical equation) (www.ndt-ed.org) If more than one atom of a specific element is in a molecule, it is followed by a number to indicate the number of atoms of the element.
Define: Compound Molecule Compound made up out of more than one type of atom.
Define: Chemical Reaction Process that produces chemical change resulting in new substances that have properties different from those of the original substance.
Created by: B0405256