Question

which two parts of the atom are located in the nucleus? electron and proton proton and neutron proton and electron positron and neutron

Explanation:

An atom consists of a nucleus and electrons. The nucleus contains protons, which are positively - charged, and neutrons, which are neutral. Electrons are outside the nucleus in electron shells. Positrons are anti - particles of electrons and not part of the normal atomic nucleus structure.

Answer:

B. proton and Neutron