Describe Bohr’s model of the atom. - Science

Question

Describe Bohr’s model of the atom.

Answer

Bohr proposed the following postulates to overcome the objections to Rutherford’s model:

Discrete Orbits: Electrons revolve around the nucleus only in certain special orbits known as discrete orbits or shells.
No Energy Radiation: While revolving in these discrete orbits, electrons do not radiate energy.
Energy Levels: These orbits or shells are called energy levels and are represented by the letters K, L, M, N... or the numbers n = 1, 2, 3, 4....

What are canal rays?

If an atom contains one electron and one proton, will it carry any charge or not?

On the basis of Thomson's model of an atom, explain how the atom is neutral as a whole.

On the basis of Rutherford's model of an atom, which sub-atomic particle is present in the nucleus of an atom?

Draw a sketch of Bohr's model of an atom with three shells.

4. What do you think would be the observation if the $\alpha$ -particle scattering experiment is carried out using a foil of a metal other than gold?

Name the three sub-atomic particles of an atom.

Helium atom has an atomic mass of 4 u and two protons in its nucleus. How many neutrons does it have?

Write the distribution of electrons in carbon and sodium atoms.

If K and L shells of an atom are full, then what would be the total number of electrons in the atom?

Subject: Science
Class: class 9
Chapter 4: Structure of the Atom
Medium: English Medium