NCERT Books for Class 10 Science Chapter 5

As per the latest CBSE curriculum, Mendeleev’s periodic table is the topic of chapter 5 and has the following concepts within it–

1. The elements are arranged in the increasing order of their atomic masses.

2. 8 groups are present.

3. Each group is subdivided into subgroups ‘a’ and ‘b’.

4. Noble gases were not discovered at that time so the groups for noble gas were not present.

5. Isotopes have no place.

Studying the above sub-topics will help the students to understand the concept of periodic tables in-depth and perform better even on future exams of science-related topics.

The students should refer to the NCERT Book for Class 10 Science for chapter 5 due to the following reasons:

1. The NCERT books are created by considering the CBSE curriculum for class 10.

2. The elaborated concepts enable the students to understand the topics efficiently.

3. The explanations provided in the book for the numerical are present in the chapter as examples.

4. The simplified and logical language used in the book is helpful to boost confidence amongst the students.

The NCERT Book for class 10 chapter 5 has the Periodic Classification of Elements and includes exercises that talk about three different periodic tables. The first is about the classification of elements in terms of their properties in the beginning. Then it moves on to explain to students exactly what Dobereiner's triad is and the concept behind it. Next, the students learn about Newland's Law of Octaves that later was removed and Mendeleev's periodic table was introduced. Finally, the chapter proceeds to explain the modern periodic table and the classification of the elements present in it.