4.1 Chemical Change

In a chemical reaction, reactant atoms and molecules react (interact) to form products that have different chemical properties or from than the reactants.

Study Guide

Explain each concept

è A chemical formula tells the composition of a compound using chemical symbols and subscripts.

è Subscripts are small numbers written below and to the right of a symbol in a formula.

è Chemical formulas can sometimes be written from the names of covalent compounds and ionic compounds.

è Chemical reactions form new substances with different properties than the starting substances.

è Clues that a chemical reaction is taking place include formation of a gas or solid, a color change, and an energy change.

è Name the chemical formula for baking soda.

è Name the chemical formula for calcium chloride.

è Name ten prefixes used in chemical names