Question

What is meant by nucleus and shell in atom?​

Answer 1

Answer:

Many models describe the way protons and neutrons are arranged inside a nucleus. One of the most successful and simple to understand is the shell model. In this model the protons and neutrons occupy separate systems of shells, analogous to the shells in which electrons are found outside the nucleus.

Explanation:

Answer 2

Nucleus is the central mass of the atom it consists of the protons and the neutrons which make up most is the mass of the atom
She’ll ate the energy orbits around the nucleus in which electrons or is around the nucleus