CBSE Class 11 Chemistry Classification of Element And Periodicity In Properties Worksheet

Access the latest CBSE Class 11 Chemistry Classification of Element And Periodicity In Properties Worksheet. We have provided free printable Class 11 Chemistry worksheets in PDF format, specifically designed for Chapter 3 Classification of Elements and Periodicity in Properties. These practice sets are prepared by expert teachers following the 2025-26 syllabus and exam patterns issued by CBSE, NCERT, and KVS.

Chapter 3 Classification of Elements and Periodicity in Properties Chemistry Practice Worksheet for Class 11

Students should use these Class 11 Chemistry chapter-wise worksheets for daily practice to improve their conceptual understanding. This detailed test papers include important questions and solutions for Chapter 3 Classification of Elements and Periodicity in Properties, to help you prepare for school tests and final examination. Regular practice of these Class 11 Chemistry questions will help improve your problem-solving speed and exam accuracy for the 2026 session.

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CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
 
1. Write the symbol and IUPAC name of the element with atomic number 126.
 
2. Among the elements of the third period, pick out the element with
i. highest first IE
ii. largest atomic radius
iii. most reactive non-metal
iv. most reactive metal
 
3. Which atom in each of the following pairs has greater first IE? Give reasons.
 
a) B or C    b) N or O      c) F or Ne     d) Cl or F     e) K or Ar     f) Kr or Xe
 
4. Arrange the following in increasing order of size by giving reason
 
a) K, K+     b) I+, I , I-      c) Li+, Na+     d) P, As      e) Mg2+, Na+     f) O2-, F-
 
5. Predict the position in the periodic table
 
i) (n-1)d1 ns2 where n=4 ii) (n-1) d2 ns2 where n=5
 
6. If A = 1s2, 2s2, 2p1 B = 1s2, 2s2, 2p6, 3s2, 3p1
C = 1s2, 2s2, 2p6, 3s2, 3p3 D = 1s2, 2s2, 2p6, 3s2, 3p5
E = 1s2, 2s2, 2p6, 3s2, 3p6, 4s2 F = 1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d1
 
i) Which is the most metallic?
ii) Which has the highest negative value for electron gain enthalpy?
iii) Which one belongs to the d-block?
iv) Which is a halogen?
v) Which two elements are in the same group?
vi) Which element belongs to the 13th group?
 
7. The first & second ionization enthalpies &electron gain enthalpies of elements A, B, C.&D are as follows

CBSE Class 11 Chemistry Classification of Element And Periodicity In Properties Worksheet 1

Identify the element which is likely to be a
i. most reactive non-metal iii. most reactive metal
ii. a noble gas iv. metal forming binary halide (MX2)
 
8. Explain why?
 
i. Lanthanides and actinides are placed separately in the periodic table
 
ii. IE of Na+ is almost double that of Ne.
 
iii. Third period contains only 8 elements.
 
iv. Cl- is larger than Cl.
 
v. IE2 of Na is greater than IE2 of Mg.
 
vi. IE1 of B is 800kJ/mole while IE1 of Be is 900kJ/mole.
 
vii. ΔegH of F is less negative than that of Cl.
 
viii. IE1 of N is 1402kJ while that of O is 1314kJ.
 
ix. Li & Mg resemble in many of their properties.
 
9. Arrange the following elements S, P, O, N in the increasing order of non-metallic character
 
10. What is the difference between electron gain enthalpy and electro negativity?
 
11. What are isoelectronic species? Name the species that will be isoelectronic with each of the following atoms or ions. (i) F- (ii) Ar (iii) Mg2+ (iv) Rb+
 
12 Explain why cations are smaller than corresponding atoms whereas anions are larger than their parent atoms.
 
13 Define ioinsation enthalpy. What are the various factors due to which the ionization enthalpy of the main group elements tends to increase across a period?
 
14 Write the general characteristics and the outer electronic configuration of the following
i. s block elements iii. f block elements
ii. p block elements iv. d block elements
 
15 What do you mean by screening effect?
 
16 To which group and period will the element with atomic number 111 belong?
 
17 What is the oxidation state and covalency of [Al Br(NH3)5]2+?
 
18 What are representative elements?
 
19 What are i.) d block elements ii.) f block elements?
 
20 With the help of chemical equations explain the nature of sodium oxide and Aluminium oxide.

 

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~ Class 11 Chemistry (Old Chapters)
CBSE Class 11 Atmospheric Pollution Worksheet A
CBSE Class 11 Behaviour of Real Gases Worksheet A
CBSE Class 11 Chemistry Environmental Chemistry Worksheet
CBSE Class 11 Chemistry Environmental Chemistry Worksheet Set A
CBSE Class 11 Chemistry Environmental Chemistry Worksheet Set B
CBSE Class 11 Chemistry Environmental Worksheet
CBSE Class 11 Chemistry Hydrogen Worksheet Set A
CBSE Class 11 Chemistry Hydrogen Worksheet Set A
CBSE Class 11 Chemistry Hydrogen Worksheet Set B
CBSE Class 11 Chemistry Hydrogen Worksheet Set B
CBSE Class 11 Chemistry P-Block Elements Worksheet Set A
CBSE Class 11 Chemistry P-Block Elements Worksheet Set B
CBSE Class 11 Chemistry P-Block Elements Worksheet Set C
CBSE Class 11 Chemistry P-Block Elements Worksheet Set C
CBSE Class 11 Chemistry S-Block Elements Worksheet Set A
CBSE Class 11 Chemistry S-Block Elements Worksheet Set B
CBSE Class 11 Chemistry States of Matter Worksheet Set A
CBSE Class 11 Chemistry States of Matter Worksheet Set A
CBSE Class 11 Chemistry States of Matter Worksheet Set B
CBSE Class 11 Chemistry The p-Block Elements Worksheet Set A
CBSE Class 11 Chemistry The s-Block Elements Worksheet Set A
CBSE Class 11 Chemistry The s-Block Elements Worksheet Set B
CBSE Class 11 General Characteristics of Compounds of the Alkaline Earth Metals Worksheet A
CBSE Class 11 General Characteristics of p-block elements Worksheet A
CBSE Class 11 General Characteristics of the Compounds of the alkali metals Worksheet A
CBSE Class 11 Group 1 Elements Alkali Metals Worksheet A
CBSE Class 11 Group 13 Elements The Boron Tamely Worksheet A
CBSE Class 11 Group 14 Elements The Carbon family Worksheet A
CBSE Class 11 Group 2 Alkaline Earth Metals Worksheet A
CBSE Class 11 Hydrides Worksheet A
CBSE Class 11 Hydrogen Peroxide Worksheet A
CBSE Class 11 Ideal Gas equation Worksheet A
CBSE Class 11 Important Compounds of Calcium Worksheet A
CBSE Class 11 Important Compounds of Carbon and Silicon Worksheet A
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CBSE Class 11 Intermolecular forces Worksheet A
CBSE Class 11 Liquid state Worksheet A
CBSE Class 11 Matter and its Classification Worksheet A
CBSE Class 11 Properties and Preparation of Hydrogen Worksheet A
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Chapter 3 Classification of Elements and Periodicity in Properties CBSE Class 11 Chemistry Worksheet

Students can use the Chapter 3 Classification of Elements and Periodicity in Properties practice sheet provided above to prepare for their upcoming school tests. This solved questions and answers follow the latest CBSE syllabus for Class 11 Chemistry. You can easily download the PDF format and solve these questions every day to improve your marks. Our expert teachers have made these from the most important topics that are always asked in your exams to help you get more marks in exams.

NCERT Based Questions and Solutions for Chapter 3 Classification of Elements and Periodicity in Properties

Our expert team has used the official NCERT book for Class 11 Chemistry to create this practice material for students. After solving the questions our teachers have also suggested to study the NCERT solutions  which will help you to understand the best way to solve problems in Chemistry. You can get all this study material for free on studiestoday.com.

Extra Practice for Chemistry

To get the best results in Class 11, students should try the Chemistry MCQ Test for this chapter. We have also provided printable assignments for Class 11 Chemistry on our website. Regular practice will help you feel more confident and get higher marks in CBSE examinations.

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Are these Chemistry Class 11 worksheets based on the 2026 competency-based pattern?

Yes, our CBSE Class 11 Chemistry Classification of Element And Periodicity In Properties Worksheet includes a variety of questions like Case-based studies, Assertion-Reasoning, and MCQs as per the 50% competency-based weightage in the latest curriculum for Class 11.

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