Changes in Energy on the Molecular Level

Front

To strike or hit something with any amount of force

Back

collide/collision

Front

A form of matter with an indefinite shape and volume

Back

gas

Front

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

Back

atom

Front

Used to describe a substance that is not chemically reactive

Back

inert

Front

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

Back

matter

Front

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

Back

liquid

Front

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

Back

molecule

Front

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

Back

pressure

Front

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

Back

pure substance

Front

A state of matter with a definite volume and shape

Back

solid