A form of matter with an indefinite shape and volume

The smallest particle of an element; made of electrons, protons, and neutrons

Used to describe a substance that is not chemically reactive

Anything that has volume and mass; occurs as elements, compounds, and mixtures

A state of matter with a definite volume but no definite shape

The simplest unit of a chemical compound that can exist; formed when two or more atoms join together chemically

Force exerted on matter through contact with other matter; affects melting and boiling points

A single substance, either an element or compound, with definite composition and properties

A state of matter with a definite volume and shape

Distinct forms of matter known in everyday experience; includes solid, liquid, and gas; also referred to as phases

Average kinetic energy of all the particles in a material; measured by a thermometer in degrees (usually Celsius or Fahrenheit)

the total kinetic (motion) energy of the tiny particles that make up matter. The faster the particles move, the warmer the matter becomes.

To move rhythmically and steadily; oscillate

Energy of motion

An average of the kinetic energy of a substance