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Give scientific reasons : Elements be...

Give scientific reasons :
Elements belonging to the same group have the same valency

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NAVNEET PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS-EXERCISE
  1. Answer the following questions: Write down the electronic configurati...

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  2. Answer the following questions: Write down the electronic configurati...

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  3. Answer the following questions: The atomic number of aluminium is 13...

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  4. Answer the following questions: Observe the following diagram and ans...

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  5. Answer the following questions: Observe the following diagram and ans...

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  6. Answer the following questions: Observe the following diagram and wri...

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  7. Answer the following questions: Observe the following diagram and wri...

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  8. Answer the following questions: Observe the following diagram and wri...

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  9. Answer the following questions: Observe the following diagram and wri...

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  10. Answer the following questions: Observe the following diagram and wri...

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  11. Atomic radius goes on decreasing while going from left to right in a p...

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  12. Give scientific reasons : Metallic character goes on decreassing wh...

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  13. Give scientific reasons : Atomic radius goes on increasing down a g...

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  14. Give scientific reasons : Elements belonging to the same group have...

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  15. Give scientific reasons : Inert gases (zero group elements ) are ca...

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  16. Give scientific reasons While going down the second group , the reac...

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  17. Give scientific reasons : The third period contains only eight elem...

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  18. Give scientific reasons : Fluroine is the most reactive in Group 17...

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  19. Sodium is more metallic than Aluminium .

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  20. Distinguish between: Mendeleev's periodic table and Modern periodic ...

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