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What are the valencies of 1^(st) an...

What are the valencies of `1^(st) ` and least elements of every period in the periodic table ?

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VGS PUBLICATION-BRILLIANT-CLASSIFICATION OF ELEMENTS -THE PERIODIC TABLE -CREATIVE QUESTIONS FOR NEW MODEL EXAMINATION (SECTION -I)
  1. In CaO, what is the valency of 'Ca' ?

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  2. What is the valency of an element if that element is in the g...

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  3. What are the valencies of 1^(st) and least elements of every pe...

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  4. How does the valency vary on going down a group ?

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  5. Which property of an element is defined as the distance from t...

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  6. By which units atomic radius is measured ?

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  7. 1 pm is how many metres ?

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  8. Match it . {:("a) Cu","(i) metallic radius "),("b) Cl","(ii) cov...

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  9. How is property of atomic radius is change from top bothom ...

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  10. Pick the correct reason to increasing atomic radius when we go ...

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  11. How does atomic radius of an element vary across a period fr...

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  12. In perioids , while going left to right atomic radii of the el...

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  13. Atomic radii of some elements in the periodic table are as give...

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  14. Which one between Na and Na^(+) would have more size ?

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  15. what is the outer most electronic condfiguration of Na^(+) ?

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  16. Which one between Cl and Cl^(-) would have more size ?

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  17. which of the following is correct ?

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  18. which one has less attraction of nucleus Cl^(-) or Cl ?

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  19. What is the energy which is used to remove an electron from it...

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  20. M((g)) +IE ((a )) to M((g))^(+) +e^(-) M((g))^(+) +IE ((b)) to M...

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