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How many elements are present in the...

How many elements are present in the `5 ^(th) ` period of the long form peripodic table ? Give a possible reason .

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VGS PUBLICATION-BRILLIANT-CLASSIFICATION OF ELEMENTS-THE PERIODIC TABLES-EXERCISE
  1. How do metallic and non-metallic charcters vary in a group and ...

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  2. Give example where the electronic configuration of an element does not...

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  3. How many elements are present in the 5 ^(th) period of the lon...

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  4. What do you mean by screening effect ?

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  5. Arrange the elements B, N, Be and O in the increasing order of their i...

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  6. What is meant by first ionization energy ?

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  7. What is meant by second ionization energy ?

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  8. What do you mean by element family ?

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  9. Give the outer orbit general electronic configuration of (a) Noble g...

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  10. Give the outer orbit general electronic configuration of (b) Represe...

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  11. Give the outer orbit general electronic configuration of (c ) Transi...

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  12. Give the outer orbit general electronic configuration of (d) Inner t...

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  13. What is a triad?

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  14. Chlorine bromine , iodine are Dobereiner's triads .How do you ju...

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  15. Why are lanthanides and actinides placed separately at the bot...

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  16. Second ionization energy of an element is higher than its firs...

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  17. Hydrogen can be placed in group 1 and group 17 in the periodic table. ...

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  18. Why do inert gases have zero valency value ?

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  19. Z' element belongs to (second ) 2^(nd) group in the periodical ...

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  20. DO the atom of an element and its ion have same size ?

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