Front

What is the mass number of an element with 5 protons and 5 neutrons?

Back

10

Front

What do models of atoms help describe?

Back

Appearance and actions

Front

What is a natural element?

Back

A substance that is found in nature and cannot be broken down into simpler substances.

Front

What is a liquid?

Back

A form of matter with definite volume but no definite shape.

Front

What is a gas?

Back

A form of matter with no definite shape or volume.

Front

What is an atom?

Back

The basic unit of a chemical element.

Front

What is a molecule?

Back

A group of atoms bonded together.

Front

What is the difference between a solid and a liquid?

Back

A solid has a definite shape and volume, while a liquid has a definite volume but no definite shape.

Front

What is the definition of protons?

Back

Positively charged particles found in the nucleus of an atom.

Front

What is the definition of neutrons?

Back

Neutral particles found in the nucleus of an atom.