Atoms and Molecules Test Review OSE

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 made of only one type of atom.

Front

What is a molecule?

Back

A group of two or more atoms bonded together.

Front

Is gold an element?

Back

True, gold is an element.

Front

Is CO2 a molecule?

Back

True, CO2 is a molecule.

Front

What happens when coal burns in the presence of oxygen?

Back

A chemical reaction occurs, producing new substances like carbon dioxide.

Front

What is the best evidence of a chemical reaction?

Back

A new substance is produced.

Front

Is CO2 an element?

Back

False, CO2 is a compound made of carbon and oxygen.

Front

What is a compound?

Back

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

Front

What is the difference between an element and a compound?

Back

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