Chemistry: the branch of science that deals with the identification of the substances of which matter is composed; the investigation of their properties and the ways in which they interact, combine, and change; and the use of these processes to form new substances.
Chemistry is involved in every aspect of the cosmetology field including hair, hair dying, and chemical reactions formed when blending chemicals. All beauty products are made from combinations of chemicals and fall into the realm of chemistry.
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The periodic table of the elements
Glossary of Chemistry terms.
Helping you to understand Chemistry
Chapter12: Basics of Chemistry
a reference text for General Chemistry by Stephen Lower
Simon Fraser University
Flat World Knowledge - Chemistry Textbooks