Which of the following is not a subatomic particle? O Electron
O Neutron
O Nucleus
O Proton

The nucleus is not a subatomic particle, but rather made of the subatomic particles of protons and neutrons. An electron is also a subatomic particle, but it is not found in the nucleus. There are many other subatomic particles, but your teacher probably won't go over those terms until later.

0.88m hope i am correct : )