vocabulary

Term Definition
symbol(s) one or two letters
chemical formula A combination of symbols and numbers that represent the number and types of elements (atoms) presented in a compound
subscript a small number to the right of a symbol that is written below the normal line of letters to show how how many atoms of an element are presented in a substance . no subscript means there is only one atom presented
chemical reaction when substances interact to form one or more new substances with different properties than the original substances
chemical equation a combination of chemical formulas used to describe what happens in a chemical reaction. the equation identifies the reactants and resulting products .
coefficient a number written in front of a chemical formula to show how many molecules of that substances are present
reactant Formulas written on the left side of the arrow symbol are the starting substances in a chemical reaction
product Formulas written on the right side of the arrow symbol are the new substances formed in a chemical reaction.
yields an arrow symbol that shows a reaction has taken place. the reactants have reacted to produce a new substance (the product)
compound a substance composed of two or more elements chemically combined and in a definite proportion
physical change a change in which the characteristics of a substance are only changed physically and the original properties stay the same
chemical change a change in which a substance (Or substances) is changed into one or more new substances with different properties than the original substances
Law of conservation of mass matter is not created or destroyed , only changed . the number of atoms in the product
precipitate a solid that forms as a result of a chemical reaction . it will fall to the bottom of the container