What is an Electron? The electron is a low-mass, negatively charged particle. As such, it can easily be deflected by ...

Discovery of Protons The discovery of protons dates back to the year 1815 when the English chemist William Prout suggested ...

What is Atomic Number and Mass Number? Atomic number and mass number are always whole numbers because they are obtained ...

Isobar are elements that differ in chemical properties but have the same physical property. So, we can say that isobars ...

In order to understand the various chemical reactions that occur around us and the parameters governing these reactions, we need ...

Define Rutherford Atomic Model Rutherford Atomic Model – The plum pudding model given by J. J. Thomson failed to explain ...

Thomson’s atomic model and Rutherford’s atomic model failed to answer any questions related to the energy of an atom and ...

Bohr’s model failed to explain many concepts related to the spectrum of different atoms and splitting of spectral lines in ...

Heisenberg’s uncertainty principle states that it is impossible to measure or calculate exactly both the position and the momentum of ...

What Are Orbitals? Orbitals in Chemistry is a mathematical function depicting the wave nature of an electron or a pair ...

Quantum numbers can be used to describe the trajectory and the movement of an electron in an atom. The quantum ...

What are Atomic Orbitals? Atomic orbitals are mathematical functions that describe the wave nature of electrons (or electron pairs) in ...

Electronic Configuration of Elements “An atom of an element has different shells, sub-shells and orbitals and the distribution of electrons ...

What is the Aufbau Principle? The Aufbau principle dictates the manner in which electrons are filled in the atomic orbitals ...

The Pauli Exclusion Principle is one of the important principles, along with the Aufbau Principle and Hund’s Rule in Chemistry. ...

Introduction to Hund’s Rule Aufbau principle tells us that the lowest energy orbitals get filled by electrons first. After the ...

What are Electron Configurations? The electron configuration of an element describes how electrons are distributed in its atomic orbitals. Electron ...

Electronic Configuration of Elements “An atom of an element has different shells, sub-shells and orbitals and the distribution of electrons ...

NCERT Exemplar Solutions Class 11 Chemistry Chapter Structure of Atom Multiple-choice Questions (Type-1) 1. Which of the following conclusions could ...

NCERT Solutions for Class 11 Chemistry Chapter Structure of Atom Q.1. (i) Calculate the number of electrons which will together ...