Chapter 4.2, Problem 8SSC

Interpretation Introduction

Interpretation:

Thomson’s plum pudding atomic model is to be compared and contrasted with Rutherford’s nuclear atomic model.

Concept introduction:

Atom is the smallest particle in the element that can neither be created nor be destroyed. Various physicists have given various models of atom to describe its structure and properties such as Dalton’s atomic model, J. J. Thomson’s model, Rutherford’s model Bohr’s model.

Answer to Problem 8SSC

J. J. Thomson’s model only describes proton and electrons whereas Rutherford’s atomic model describes the presence of a nucleus and subatomic particles, neutron, proton and electron.

Explanation of Solution

J. J. Thomson gave a plum-pudding model of the atom. It describes the atoms as a spherical particle that have uniformly distributed positive charge in which individuals, negatively charged, electrons are located in fixed positions.

Rutherford’s atomic model describes that an atom is an empty space that has a small, dense central nucleus which contains zero charge subatomic particle neutron and positive charged subatomic particle protons and atom’s most of the mass. And negatively charged electrons move in the empty space which are held in the atom due to their attraction to the positive nucleus.

Conclusion

J. J. Thomson’s model only describes proton and electrons whereas Rutherford’s atomic model describes the presence of a nucleus and subatomic particles, neutron, proton and electron.