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5. Periodic Classification of Elements Class 10 science Solutions English Medium-Additional Questions With Solutions
5. Periodic Classification of Elements Class 10 science Solutions English Medium-Additional Questions With Solutions Get chapter-wise detailed explanations, step-by-step answers, important questions and exam-ready study material in Hindi and English medium.
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5. Periodic Classification of Elements Class 10 science Solutions English Medium-Additional Questions With Solutions
NCERT Solutions for Class 10 are specially prepared according to the latest CBSE syllabus (2026-27) to help students understand every concept clearly. These solutions provide step-by-step explanations, accurate answers, and exam-oriented guidance for all chapters. Class 10 students can improve their problem-solving skills, strengthen conceptual understanding, and prepare confidently for school as well as board examinations. All questions are solved in a simple and easy-to-understand language for both Hindi and English medium learners.
5. Periodic Classification of Elements Class 10 science Solutions English Medium-Additional Questions With Solutions
NCERT Solutions Class 10 science English Medium
5. Periodic Classification of Elements
Topic: Additional Questions With Solutions
Additional Questions With Solutions
Question 1. Write the main features of Mendeleev's periodic table.
Answer: Mendeleev arranged the elements in a horizontal row in the order of their increasing atomic mass. Elements with similar properties were placed in all the vertical pillars. Following are the main features of this table:-
(a) Groups and Subgroups:- There are 8 groups in the periodic table. Groups I to VII are divided into two subgroups.
(b) The number of periods in the periodic table is 7 which are known as 1,2,3,4,5,6 and 7.
1st period - 2 elements
Second Period - 8 Elements
Third Period - 8 Elements
Fourth Period - 18 Elements
Fifth Period - 18 Elements
Sixth Period - 32 Elements
seventh period - incomplete period
Question 2: Write some characteristic features of the periodic table.
Answer: Some of the distinctive features of the periodic table are as follows:-
(i) Elements are placed in a special way in groups and periods than before.
(ii) The properties of many elements were inferred from this type of classification.
(iii) The atomic masses of many elements were modified.
(iv) The possibility of discovery of new elements increased and new elements were also discovered.
Question 3 - Differentiate between modern periodic table and Mendeleev's periodic table.
Answer -
Modern periodic table
1. Elements are arranged in increasing atomic number.
2. This periodic table has 18 vertical columns and 7 horizontal rows.
3. Isotopes of elements are placed at the same place as their corresponding elements because they have the same atomic number.
4. Chemically dissimilar elements are kept in separate groups.
Mendeleev's periodic table
1. Elements are arranged in increasing atomic masses.
2. This periodic table has 8 vertical columns and 6 horizontal rows.
3. The isotopes of the elements are not found in proper positions.
4. Chemically dissimilar elements held together.
All Topics From 5. Periodic Classification of Elements
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1. Chapter Review 2. Text-book Questions 3. Exercise 4. Additional Questions With Solutions 5. Additional Questions With SolutionsNCERT Solutions Class 10 Hindi and English Medium – Complete Study Material
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