Jaiden is writing a report about the structure of the atom. in her report, she says that the atom has three main parts and two subatomic particles. do you agree with her? why or why not?

No, because an atom consists of two main parts and three subatomic
particles, protons, neutrons, and electrons. Each one is smaller than an atom, therefore they are subatomic particles. An atom only requires protons and electrons to be an atom - e.g. Hydrogen has 1 proton and 1 electron. Neutrons do not effect the overall charge of the atom, and only increase the atomic mass.