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

How many atoms can there be in a molecule?

Back

From just 2 to thousands of atoms.

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 is water made of?

Back

Water is made of two hydrogen atoms and one oxygen atom (H2O).

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

What is the total number of atoms in an ammonia (NH3) molecule?

Back

There are 4 atoms in an ammonia molecule (1 nitrogen and 3 hydrogen).