Atoms and Elements

Front

All matter is made of —

Back

atoms

Front

What is the smallest part of matter?

Back

an element

Front

What is the number of protons in oxygen?

Back

8

Front

The number of protons determines the ______.

Back

element

Front

A substance made of the atoms of two or more different elements is called a ______.

Back

Compound

Front

What is an atom?

Back

The basic unit of a chemical element.

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.

Front

What is the atomic number?

Back

The number of protons in the nucleus of an atom.

Front

What is a proton?

Back

A positively charged particle found in the nucleus of an atom.