Atoms and Molecules Review

Front

Which subatomic particles are located in the electron cloud?

Back

Electrons are the subatomic particles located in the electron cloud.

Front

What is the smallest unit of all matter?

Back

The smallest unit of all matter is an atom.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What is the total number of atoms in an ammonia (NH3) molecule?

Back

An ammonia (NH3) molecule contains 4 atoms (1 nitrogen and 3 hydrogen).

Front

The atomic number is also equal to the number of which subatomic particles?

Back

The atomic number is equal to the number of protons and electrons in a neutral atom.

Front

What are protons?

Back

Protons are positively charged subatomic particles found in the nucleus of an atom.

Front

What are neutrons?

Back

Neutrons are neutral subatomic particles found in the nucleus of an atom.

Front

What are electrons?

Back

Electrons are negatively charged subatomic particles that orbit the nucleus in the electron cloud.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together.

Front

What is the difference between an atom and a molecule?

Back

An atom is the smallest unit of matter, while a molecule is made up of two or more atoms bonded together.