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Periodic Classification of Elements Practice Questions

THE PERIODIC CLASSIFICATION OF ELEMENTS PRACTICE QUESTIONS (CHEMISTRY) 

1.What is Lavoisier classification?

2.Why Lavoisier classification failed? 

3.Define law of triads. 

4.Why the law of triad failed? 

5.Who gave law of triads and when?

 6.Define law of octaves.

 7.Why the law of octave failed? 

8.Who gave law of octave and when? 

9.Define periodic law of Mendeleev.

10. Who gave periodic law of Mendeleev and when? 

11. What is full name of Mendeleev? 

12. Write some words about Mendeleev. 

13. Why periodic table of Mendeleev modified? 

14. Write the features of the modified version of Mendeleev periodic table. 

15. Why the Mendeleev periodic table failed? 

16. Who gave modern periodic table and when? 

17. Define the periodic law of Moseley? 

18. Write the features of modern periodic table. 

19. Mendeleev periodic table was based on? 

20. Modern periodic table was based on? 

21. Explain electronic configuration is the basis of modern periodic table. 

22. What are the characteristics of group? 

23. What is ionization energy? 

24. What is electron affinity?

25. What are characteristics of periods? 

26. Define groups and periods. 

27. Write the advantages of the modern periodic table over Mendeleev periodic table. 

28. How do you predict the properties of an atom? 

29. What are actinides? 

30. What are lanthanides? 

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