Atoms, Elements, Molecules, Compounds

Front

What is an atom?

Back

The smallest unit of an element that retains the properties of that element.

Front

What is an element?

Back

A pure substance that cannot be broken down into simpler substances by chemical means, consisting of only one type of atom.

Front

What is a molecule?

Back

A group of two or more atoms bonded together, which can be of the same or different elements.

Front

What is a compound?

Back

A substance formed when two or more different elements are chemically bonded together.

Front

Are all compounds also molecules?

Back

Yes, all compounds are molecules because they consist of two or more atoms bonded together.

Front

Is H₂O a molecule or a compound?

Back

H₂O is both a molecule and a compound.

Front

What distinguishes a molecule from a compound?

Back

A molecule can consist of the same type of atoms (like O₂), while a compound consists of different types of atoms (like H₂O).

Front

What is the chemical formula for water?

Back

H₂O.

Front

What is ozone?

Back

Ozone (O₃) is a molecule made up of three oxygen atoms and is an example of an element that is not a compound.

Front

What is the difference between an atom and a molecule?

Back

An atom is a single unit of an element, while a molecule is made up of two or more atoms bonded together.