Question

delete the number of electron proton neutron and nuclei in mgco3 ​

Answer 1

One of the elements of the physics of nuclei is the matter of magic numbers. They represent a shell being completely filled so additional nucleons have to go into a higher shell. A higher shell involves a greater separation from the other nucleons and lower interaction energy. The conventional magic numbers are {2, 8, 20, 28, 50, 82, 126}. These numbers were found in the case of protons by comparing the number of stable isotopes for different proton numbers. For neutrons the magic numbers were found by comparing the number of stable nuclides with the same neutron numbers.

A stronger indication of magicality of a number is in terms of the incremental binding energies (IBE).

Let BE(n, p) indicate the binding energy of a nuclide with n neutrons and p protons. The incremental binding energy of the n-th neutron in that nuclide is

IBEn = BE(n, p) − BE(n-1, p)

For example, the IBEn for the isotopes of Strontium are: