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Which important property did Mendeleev u...

Which important property did Mendeleev use to classify the elements in his periodic table?

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Mendeleev used 'atomic weight' as the basis of classification of elements in the periodic table.
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PATHFINDER-PERIODIC CLASSIFICATION OF ELEMENTS AND PERIODIC PROPERTIES-QUESTION BANK
  1. Arrange Mg^2+ , O^2- , Na^+ and F^- in the descending order of their i...

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  2. Which one of the iso-electronic ions K^+ , Cl^- , S^(2-) and Ca^(2++) ...

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  3. Which important property did Mendeleev use to classify the elements in...

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  4. Fourth period has 18 elements and not 52. Explain.

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  5. Give the general electronic configuration of 's' and 'p'-block element...

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  6. What are 'transition' elements?

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  7. What do you mean by 'inner-transition elements'?

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  8. Give the Electronic configuration and position of the elements in the ...

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  9. Why are the cations smaller than atom?

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  10. To which block does the element with atomic number 50 belong?

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  11. Arrange the increasing order of atomic radii Li, Na, K.

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  12. Which is largest among Ca^(+2), Mg^(+2) , Ba^(+2) and why?

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  13. Which of the elements Na, Mg, Si and P have the geatest difference bet...

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  14. Why Gr-17 elements acts as good oxidising agent?

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  15. Arrange Cl, Cl^- , Cl^+ in the increasing order of size?

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  16. How does metallic character vary in the group and period?

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  17. State the decreasing order of the penetration power of orbitals.

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  18. An element has on atomic number = 53. State its position in the Period...

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  19. The Reason for diagonal relationship is -

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  20. The order of ionic redius of N^(3-), O^(2-), F^- and Na^+ is -

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