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.
Which of the following complex ions is not optically active?
- $[ \text{Co}(ox)_3 ]^{3-}$
- $\text{cis}-[\text{Co}(en)_2\text{Cl}_2]^+$
- $\text{trans}-[\text{Co}(en)_2\text{Cl}_2]^+$
- $[ \text{Co}(en)_3 ]^{3+}$
View Solution
2.
The primary and secondary valences of Co in [Co(en)₃]Cl₃ respectively are:
- 3, 3 \hspace{1cm}
- 0, 3
- 6, 3 \hspace{1cm}
- 3, 6
View Solution
3.
Assertion (A): [Cr(H_2O)_6]Cl_2 and [Fe(H_2O)_6]Cl_2 are examples of homoleptic complexes.
Reason (R): All the ligands attached to the metal are the same.
- Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
- Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
- Assertion (A) is true, but Reason (R) is false.
- Assertion (A) is false, but Reason (R) is true.
View Solution
4.
Which of the following haloalkanes react with aqueous KOH most rapidly by $S_N1$ reaction?
- 2-Chlorobutane
- 1-Bromobutane
- 2-Bromo-2-Methylpropane
- 2,2-Dimethyl-1-Chloropropane
View Solution
5.
Polyhalogen compounds have wide application in industries and agriculture. DDT is also a very important polyhalogen compound. It is a:
- greenhouse gas
- fertilizer
- biodegradable insecticide
- non-biodegradable insecticide
View Solution
6.
Coordination number of Fe in $[Fe(C_2O_4)_3]^{3-}$ is :
- 6
- 3
- 4
- 5
View Solution