What are the three principle parts of an atom?​

A) ​electron, proton, and quark
B) neutron, positron, and electron
C) ​electron, neutron, and proton
D) ​neutron, quark, and electron

The three principal parts of an atom are the electron, neutron, and proton. Electrons are negatively charged particles that orbit the nucleus, which is made up of positively charged protons and neutrally charged neutrons.