Chemical Definition - Chemistry Glossary

There are two definitions of the word chemical as the term is used in chemistry and common usage: Chemical Definition (adjective) As an adjective, the term chemical indicates a relationship to chemistry or to the interaction between substances. Used in a sentence: She studied chemical reactions.They determined the chemical composition of the soil. Chemical  Definition (noun) Everything which has mass is a chemical. Anything consisting of matter is a chemical. Any liquid, solid, gas. A chemical includes any pure substance; any mixture. Because this definition of a chemical is so broad, most people consider a pure substance (element or compound) to be a chemical, particularly if it is prepared in a laboratory. Examples of Chemicals Examples of things which are chemicals or consist of them include  water, pencil, air, carpet, light bulb, copper, bubbles, baking soda, and salt. Of these examples, water, copper, baking soda, and salt are pure substances (elements or chemical compounds. A pencil, air, carpet, a light bulb, and bubbles consist of multiple chemicals. Examples of things which are not chemicals include light, heat, and emotions.