NCERT Solutions for class 11 Chemistry Chapter 2: Structure of Atom

NCERT Solutions for class 11 Chemistry Chapter 2 Structure of Atom are provided in the article. Some of the important topic cover under Structure of atom chapter includes:

Expected no.of questions: 3 to 6 questions of total 9 marks

Download PDF: NCERT Solutions for Class 11 Chemistry Chapter 2 PDF

NCERT Solutions for Class 11 Chemistry Chapter 2

NCERT Solutions for class 11 Chemistry Chapter 2 Structure of Atom PDF is given below.

Class 11 Chemistry Chapter 2 Structure of Atom – Important Topics

Atom consists of three subatomic particle – Protons, Neutrons and Electrons.

Protons: These are positively charged particles which are present in the nucleus.
Neutrons: These are neutral particles which are present in the nucleus.
Electrons: These are negatively charged particles which revolve around the nucleus.

Atomic Number of an element is the number of electrons or protons in the atom. The elements in the periodic table are arranged according to the atomic numbers.

Mass Number of an element is the total mass of the nucleon (protons+neutrons) present in an atom. Since electrons are very light, their mass is negligible.

Some of the important atomic models are:

Thomson’s Model
Rutherford Model
Neils Bohr Model

Electrons are filled in orbitals revolving around the nucleon. From lower to higher energy levels, shells are always filled in a step-by-step manner. Electrons aren't filled in following shell until shells before it have been filled.

Electrons in the outermost shell are called valence electrons. These determine the affinity of an element to combine with other elements.

Related links for Class 11 Chemistry Chapter 2 Articles:

Discovery of Electron	Charge of mass ratio of electron	Isotopes and isobars
Wavenature of electromagnetic radiation	Photoelectric effect	Emission and Absorption spectra
Limitations of Bohr atomic model	Quantum mechanical model of an atom	Energy of orbitals

Chemistry Related Articles:

NCERT Solutions for Class 11 Chemistry	Important Chemistry Formulas	Chemistry Study Material
Difference between Articles in Chemistry	Important Named Reactions	Chemistry Notes

CBSE CLASS XII Related Questions

1.
A solution is prepared by dissolving 0.025 g of potassium sulphate in 2 L of water at 27$^\circ$C. Assuming potassium sulphate is completely dissociated, determine its osmotic pressure. Given: \[ R=0.082 \, L\,atm\,K^{-1}mol^{-1} \] \[ \text{Molar mass of }K_2SO_4=174\,g\,mol^{-1} \] (ii) What type of azeotrope will be formed by a solution of acetone and chloroform? Give reason.
View Solution
2.
(I) Which of the following is more reactive towards S$_N$1 reaction: 2-Bromo-2-methylbutane or 1-Bromopentane (II) What type of halide is present in the following compound: \[ \begin{array}{c} CH_3-CH-C=CH_2\\ |\\ CH_3 \end{array} \] \[ | \] \[ Cl \] (III) Why is chloroform stored in dark coloured bottles? (ii) Define the following terms: (I) Ambident Nucleophiles (II) Racemic mixture
View Solution
3.
Half-life ($ t_{1/2} $) of a first order reaction is 1386 s. The value of rate constant is:
- $0.5 \times 10^{-4} \, \text{s}^{-1}$
- $5.0 \times 10^{-4} \, \text{s}^{-1}$
- $0.5 \times 10^{-5} \, \text{s}^{-1}$
- $0.5 \times 10^{-3} \, \text{s}^{-1}$
View Solution
4.
State Faraday’s second law of electrolysis.
View Solution
5.
Predict the products of electrolysis in each of the following: (i) An aqueous solution of CuCl$_2$ with platinum electrodes. (ii) A concentrated solution of H$_2$SO$_4$ with platinum electrodes.
View Solution
6.
The half-life periods of decomposition of $\mathrm{NH_3}$ for different initial pressures are given below :

The order of the reaction is :
- zero order
- first order
- 0·5
- second order
View Solution