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Science 10/3/12

For science vocab

Law of conservation of mass the mass of an isolated system (closed to all matter and energy) will remain constant over time.
physical change Physical changes are concerned with energy and states of matter
chemical change A chemical change produces a new substance.
element a representation of a substance using symbols for its constituent elements.
element(diatomic) molecule Diatomic molecules are molecules composed only of two atoms, of either the same or different chemical elements.
Compound molecule two different molecules formed when two or more atoms of an element chemically join together.
chemical equation A chemical equation is symbolic representation of a chemical reaction
chemical reaction A process that involves rearrangement of the molecular or ionic structure of a substance
reactants(in a chemical equations) Chemical equations show the reactants and products
products(in a chemical equation) other substances (compounds and/or elements) called products
Coefficient (in a chemical equation The coefficients next to the symbols and formulae of entities are the absolute values of the stoichiometric numbers
subscript (in a chemical equation) The subscripts tell you how many atoms of each element are in the equation
Chemical formula A chemical formula or molecular formula is a way of expressing information about the atoms
Created by: d0403716