Bases; compounds that react with acids to form salts.

Subatomic particles with a negative charge.

The simplest form of chemical matter; an element cannot be broken down into a simpler substance without a loss of identity.

A change in the chemical composition or make-up of a substance.

An unstable physical mixture to two or more immiscible substances (substances that normally will not stay blended) plus a special ingredient called an emulsifier.

A solution that has a pH above 7.0 (neutral)

Molecule containing two or more atoms of the same element in definite (fixed) proportions.

An ion with a negative electrical charge.

Chemical reactions that release a significant amount of heat.

Compounds; a chemical combination of two or more atoms of different elements in definite (fixed) proportions.

An ion with a positive electrical charge.

The smallest chemical components (often called particles) of an element; structures that make up the element and have the same properties of the element.

Rapid oxidation of a substance, accompanied by the production of heat and light.

Characteristics that can only be determined by a chemical reaction and a chemical change in the substance.

Science that deals with the composition, structures, and properties of matter, and how matter changes under different conditions.

Alkaline substances used to neutralize acids or raise the pH of many hair products.

AHAs; acids derived from plants (mostly fruit) that are often used to exfoliate the skin.

A solution that has a pH below 7.0 (neutral)

Colorless gas with a pungent odor that is composed of hydrogen and nitrogen.