Chapter 5, Problem 28A

Interpretation Introduction

Interpretation: To determine assumptions made by Bohr about the motion of electrons.

Concept Introduction: Bohr was the scientist who gave the postulates for the structure of an atom and the position of electrons in a particular atom.

Answer to Problem 28A

Bohr assumes that electrons would travel in circular paths surrounding the nucleus and do not dissipate energy.

Explanation of Solution

Bohr said that electrons move in the circular path in an atom’s orbital. Proton and neutrons are present in the nucleus with a positive charge. It can be understood by taking the example of the $\text{Si}$ atom. It has 14 electrons. 2 electrons travel in K-shell, 8 electrons travel in L-shell whereas 4 electrons travel in M-shell in a circular path.

The postulates of the Bohr model are shown as:

• Electrons will travel in a circular path surrounding the nucleus, which will be termed an orbital.
• Every orbital will contain its own definite energy.
• Electrons present in these orbitals do not lose energy.
• The energy level will be indicated by the n, quantum number which will be indicated by n where n is 1,2,3….