MCQ Structure of the Atom Chapter 4 Class 9 Science

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MCQ’s For All Chapters – Science Class 9th

1. The neutral sub-atomic particle was discovered by

Question 1 of 15

2. Neutron has

Question 2 of 15

3. Neutrons are present in the nucleus of all atoms except

Question 3 of 15

4. The mass of an atom is mainly due to

Question 4 of 15

5. The distribution of electrons in orbits is given by

Question 5 of 15

6. The maximum number of electrons in a shell is given by the formula

Question 6 of 15

7. The first shell (K) can hold a maximum of

Question 7 of 15

8. The L shell can hold a maximum of

Question 8 of 15

9. The outermost shell can have a maximum of

Question 9 of 15

10. Shells are filled

Question 10 of 15

11. The electrons in the outermost shell are called

Question 11 of 15

12. An atom with 8 electrons in the outermost shell has

Question 12 of 15

13. The tendency of atoms to achieve 8 electrons in their outermost shell is called

Question 13 of 15

14. Atoms achieve octet by

Question 14 of 15

15. The valency of sodium is

Question 15 of 15


 

Comments

  1. Rahul says:
    February 2, 2025 at 6:39 am

    very good test but some i got doubt i got clarification

    Reply

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