It has been found that nuclides with `2,8,20,50,82,` and `126` protons or neutrons are exceptionally stable. These numbers are refferd to as the magic numbers and their existance has led to.

Options

A. the idea of periodicity in nuclear properties similar to the periodicity of chemical elements in periodic table.
B. the so-called 'liquid drop model of the nucleus
C. the so-called 'shell model of the nucleus'
D. have a convenient explanation of 'nuclear fission`

Answer

A, C