Chapter 20, Problem 20.103QP

Interpretation Introduction

Interpretation:

• Structure of alpha particle in term of shell model has to be described.
• The alpha particle are especially stable. This is why has to be explained.

Concept introduction:

Shell model:

Shell model has explained an energy level distribution into various shell and nucleus of the atom.  A shell is defined as the energy level in which the particle having identical energy.  In shell model, nuclear particles are paired as neutron with neutron or proton with proton.  In nuclear energy level, thus paired neutrons and protons are filled if the number of protons or neutrons is equal to magic number.

Magic number are 2,8,20,28,50,82 or 126.  This magic number shows stability of the nuclei.