Structure of Atoms and the Periodic Table

Front

What does the atomic number represent?

Back

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

Front

What is the atomic number of oxygen?

Back

The atomic number of oxygen is 8.

Front

What are the particles that orbit around the nucleus of an atom called?

Back

Electrons.

Front

Where is most of the mass of an atom found?

Back

Most of the mass of an atom is found in the nucleus.

Front

What is the mass number of an element?

Back

The mass number is the total number of protons and neutrons in the nucleus of an atom.

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the charge of a neutron?

Back

A neutron has no charge (it is neutral).

Front

What is the charge of an electron?

Back

An electron has a negative charge.

Front

What is the nucleus of an atom?

Back

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

Front

What is an isotope?

Back

An isotope is a variant of an element that has the same number of protons but a different number of neutrons.