Which of the following is not a type of particle that is found in the nucleus of an atom

A; electron

B; proton

C; neutron

It's c because Atoms contain three sub-atomic particles called protons, neutrons and electrons. The protons and neutrons are found in the nucleus at the centre of the atom.

The answer is A:electrons because they are found outside of the nucleus while protons and neutrons are found in the center of the atom