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A: Elements along a period possess d...

A: Elements along a period possess different chemical properties .
R: The electronic confiuration of valence shell of any two elements in a period is not same .

A

A' and 'R' are correct and 'R' is correct reason for 'A'

B

A' and 'R' are correct but 'R' is not a correct reason for 'A'

C

A' is correct but 'R' is wrong .

D

A' is wrong but 'R' is correct

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The correct Answer is:
A
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VGS PUBLICATION-BRILLIANT-CLASSIFICATION OF ELEMENTS -THE PERIODIC TABLE -CREATIVE QUESTIONS FOR NEW MODEL EXAMINATION (SECTION -I)
  1. TO which group Lanthanoids and actinides belongs ?

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  2. Who did experiments to calculate the number of positive charges ...

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  3. A: Elements along a period possess different chemical properties...

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  4. Which property of an element is called as combining power of it...

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  5. In NaH , what is the valency of 'Na' ?

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  6. In CaO, what is the valency of 'Ca' ?

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

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

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

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

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  11. By which units atomic radius is measured ?

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  12. 1 pm is how many metres ?

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

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

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

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

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

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

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

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

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