Identify the parts of the atom that are labeled in the diagram

A- Nucleus

B-Energy levels

Explanation:

An atom refers to the smallest particle of an element that can take part in a chemical reaction.An atom is made up of two major parts namely; the nucleus and the energy shell or energy levels.The nucleus of an atom contains the sub atomic particles, protons and neutrons while the energy shells contain the sub atomic particle electrons.It is important to note that the protons in the nucleus are positively charged which makes the nucleus to be positively charged.On the other hand, energy shells are negatively charged because of the negative charge of the electrons.