Atoms & Molecules

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together.

Front

What is a compound?

Back

A compound is a substance made of two or more different types of atoms bonded together.

Front

What is the difference between an element and a compound?

Back

An element is made of only one type of atom, while a compound is made of two or more different types of atoms.

Front

What are the three states of matter?

Back

The three states of matter are solid, liquid, and gas.

Front

What is a solid?

Back

A solid is a state of matter that has a definite shape and volume.

Front

What is a liquid?

Back

A liquid is a state of matter that has a definite volume but takes the shape of its container.

Front

What is a gas?

Back

A gas is a state of matter that has no definite shape or volume and expands to fill its container.

Front

How many atoms are in a molecule of water (H2O)?

Back

A molecule of water contains 3 atoms: 2 hydrogen atoms and 1 oxygen atom.

Front

What is the chemical formula for carbon dioxide?

Back

The chemical formula for carbon dioxide is CO2.