Question

define magic number ?????????​

Answer 1

Explanation:

The protons and neutrons inside the atomic nucleus exhibit shell structures in a manner similar to electrons in an atom. For naturally stable nuclei, these nuclear shells fill completely when the numbers of protons or the number of neutrons is equal to the 'magic number's 2, 8, 20, 28, 50, 82 or 126.

Answer 2

Answer:

These numbers, commonly known as Magic numbers are defined as the number of nucleons required for completion of the energy levels of the nucleus. Nucleons are arranged in shells as two protons or two neutrons (with paired spins) just like electrons arranged in the extra-nuclear part.