In this chapter, we will explore Bohr’s atomic model and its postulate. We will also see the derivation of radius of Bohr’s orbit, velocity of…

The hydrogen spectrum refers to the spectrum of light emitted or absorbed by hydrogen atoms. It is an example of the line emission spectrum or…

A spectrum is the impression or pattern formed on a screen when electromagnetic radiation of particular wavelengths is analyzed and dispersed using a prism or…

Electromagnetic spectrum is the arrangement of all the electromagnetic radiations or waves in the increasing order of their wavelengths or decreasing order of their frequencies.…

In this chapter, we will understand the wave nature of electromagnetic radiation with its definition, characteristics, and examples. We know that light is an important…

When the atoms of different elements have the same mass number but different atomic number, then they are called isobars in chemistry. As the mass…

All the atoms of a particular chemical element have the same number of protons in their nuclei, but the number of neutrons may be different.…

In this chapter, we will understand what is mass number and how to find it with the help of solved examples. You have studied that…

The number of protons present in the nucleus of each atom of an element is called atomic number of an element. Generally, it is represented…

In this chapter, we will understand the discovery of neutron discovered by James Chadwick in 1932. Up to 1932, it was considered that an atom…