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.

Front

What is a molecule?

Back

A group of two or more atoms bonded together.

Front

What is a compound?

Back

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

Front

What is a mixture?

Back

A combination of two or more substances that are not chemically bonded.

Front

What is a crystal?

Back

An extended structure with repeating patterns of atoms or molecules.

Front

What distinguishes a compound from a mixture?

Back

A compound has a fixed composition and properties, while a mixture does not.

Front

Can a molecule be an element?

Back

Yes, a molecule can be an element if it consists of two or more of the same type of atom, like O2.

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.

Front

What is the chemical formula for water?

Back

H2O, which indicates it is a compound.