Concept:Electrons are located outside the nucleus and revolve around it in energy shells or orbits.
Explanation:The nucleus of an atom contains only protons and neutrons.
These particles are called nucleons.
Electrons are never present inside the nucleus.
The mass number
A=23 and the number of neutrons
N=17 can be used to find the number of protons:
Z=A−N=23−17=6.
These 6 protons give the atomic number, but they do not affect the location of electrons.
Since electrons are not found inside the nucleus, the number of electrons in the nucleus is zero, irrespective of the mass number or neutron count.
Therefore, the correct answer is none.
Answer:A. none