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Science 8 Chapter 3

Chemical Reactions

energy one of the spaces around the nucleus of an atom in which an electron moves
ion an atom that has either a positive or a negative charge
chemical bond the attractive force that hold atoms together
chemical formula tells the kinds of atoms and how many of each kind are in a compound
subscript a number in a formula that tells the number of atoms of an element in a compound
radicals a group of two or more atoms that acts like one atom
chemical reaction a chemical change in which elements are combined or rearranged.
mixture a combination of substances in which no reaction takes place
chemical equation a statement that uses symbols, formulas, and numbers to stand for a chemical reaction
product a substance that is formed in a chemical reaction
law of conservation of matter matter cannot be created or destroyed in chemical and common physical changes
balance to keep the number of atoms the same on both sides of the equation
coefficient a number placed before a formula in a chemical equation
dissolve to break apart
solution a mixture in which one substance is dissolved in another
solute the substance that is dissolved in a solution
solvent a substance capable of dissolving one or more other substances
chemical change a change that produces one or more new substances with new chemical properties
physical change a change in which the appearance (physical properties) of a substance changes but its chemical properties stay the same.
Created by: romperroomqueen