Structure of an Atom

Front

Which two particles make up the nucleus of an atom?

Back

Protons and Neutrons.

Front

Isotopes of an element contain an equal number of protons but a different number of ____________________.

Back

neutrons.

Front

The particles with no charge in an atom are the _______.

Back

neutrons.

Front

Oxygen’s atomic number is 8. This means that an oxygen atom must have __________.

Back

8 protons.

Front

What is the atomic number?

Back

The number of protons in an atom.

Front

What are protons?

Back

Positively charged particles found in the nucleus of an atom.

Front

What are neutrons?

Back

Neutral particles found in the nucleus of an atom.

Front

What are electrons?

Back

Negatively charged particles that orbit the nucleus of an atom.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.

Front

What is an isotope?

Back

Atoms of the same element with the same number of protons but different numbers of neutrons.