Atoms and Molecules

Front

What is the charge of an electron?

Back

Negative.

Front

What do atoms combine to make?

Back

All the substances on Earth.

Front

What is the atomic number of an element?

Back

It represents the number of protons in the nucleus of an atom.

Front

What is formed when two or more atoms are joined together?

Back

A molecule.

Front

What is created when two different elements are chemically combined?

Back

A compound.

Front

What are the three main subatomic particles?

Back

Protons, neutrons, and electrons.

Front

What is the nucleus of an atom?

Back

The central part of an atom, containing protons and neutrons.

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 difference between an atom and a molecule?

Back

An atom is the smallest unit of an element, while a molecule is made up of two or more atoms.