Front

What is a form of matter with indefinite shape and volume?

Back

Gas

Front

What is the smallest particle of an element made of electrons, protons, and neutrons?

Back

Atom

Front

What is the simplest unit of a chemical compound that can exist and is formed when two or more atoms join together chemically?

Back

Molecule

Front

In which state are molecules spaced far apart from one another, only colliding occasionally?

Back

Gas

Front

What term is used to describe a substance that is not chemically reactive?

Back

Inert

Front

What is the process called when a gas changes into a liquid?

Back

Condensation

Front

What is the term for the energy required to change a substance from solid to liquid?

Back

Heat of fusion

Front

What is the term for the energy change that occurs during a chemical reaction?

Back

Enthalpy change

Front

What is the state of matter characterized by a definite shape and volume?

Back

Solid

Front

What is the term for the energy stored in the bonds of chemical compounds?

Back

Chemical energy