MCQ Class 9 Science Exploration Chapter 8 Journey Inside the Atom

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1. Isobars have different:

Question 1 of 20

2. Symbol Fe comes from:

Question 2 of 20

3. Symbol Na comes from:

Question 3 of 20

4. First letter of symbol is:

Question 4 of 20

5. Second letter is:

Question 5 of 20

6. IUPAC stands for:

Question 6 of 20

7. Electron mass is:

Question 7 of 20

8. Nuclear force:

Question 8 of 20

9. Carbon-14 is used in:

Question 9 of 20

10. Uranium-235 is used in:

Question 10 of 20

11. Cobalt-60 is used in:

Question 11 of 20

12. Iodine-131 is used in:

Question 12 of 20

13. Average atomic mass considers:

Question 13 of 20

14. Chlorine average atomic mass is:

Question 14 of 20

15. Electron configuration is:

Question 15 of 20

16. Hydrogen has electrons:

Question 16 of 20

17. Helium is stable because:

Question 17 of 20

18. Lithium atomic number is:

Question 18 of 20

19. Nucleons include:

Question 19 of 20

20. Modern model describes electrons as:

Question 20 of 20


 

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