Which subatomic particles are found inside of an atom’s nucleus?

Answer 1

protons and neutrons

Answer 2

Protons and neutrons are found in an atom's nucleus.

Answer 3

The two major particles found inside the atom's nucleus are:

Protons

Neutrons

This is at the introductory level. If you want information about fermions, bosons, etc., re-submit the question being more specific.