NCERT Activity 5.7 Class 10 Science Explanation with conclusion

If you are looking for NCERT Science Class 10 Chapter 5 Activity solutions, then you are in the right place. In this post, you will find NCERT Activity 5.7 Class 10 Science Explanation with conclusion.

NCERT Activity 5.7 Class 10 Science Explanation with conclusion

You are suggested to study NCERT activity 5.7 class 10 science explanation with conclusion so that you can attempt questions based on the activity 5.7 class 10 science.

Class 10 Science Chapter 5 Periodic Classification of Elements

 

Activity 5.7 Class 10 Science

·     Atomic radii of the elements of the second period are given below:

Period II elements:      B     Be   O     N     Li     C

Atomic radius (pm) :  88   111   66   74    152   77

·     Arrange them in decreasing order of their atomic radii.

·     Are the elements now arranged in the pattern of a period in the Periodic table?

·     Which elements have the largest and the smallest atoms?

·     How does the atomic radius changes as you go from left to right in a period?

Discussion

·     The decreasing order of the atomic radii of the elements of the second period is given as follows:

                      

Li	Be	B	C	N	O
152	111	88	77	74	66

·     Yes, the above elements are arranged in the pattern of a period in the periodic table.

·     Lithium has the largest and oxygen has the smallest atom.

        

Since the nuclear charge (the number of protons) increases from left to right in a period, the electrons experience more attraction towards the nucleus. As a result, the atomic radii of the elements decrease from the least to the right as shown in the table. 

    

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1. Next Activity - Activity 5.8 Class 10 Science

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3. NCERT Solutions of Class 10 Science Chapter 5

4. MCQ Questions of chapter 5

5. Solutions of Class 10 Science all chapters

5. Extra Questions of Chapter 5