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Why are the cations smaller than atom?...

Why are the cations smaller than atom?

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Cations are smaller than atom, this is due to the fact that effective nuclear charge of the cation is higher which causes greater attraction between the nucleus and the outer most shell electron. So contraction of size, takes place so `M^+ ltM`.
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PATHFINDER-PERIODIC CLASSIFICATION OF ELEMENTS AND PERIODIC PROPERTIES-QUESTION BANK
  1. What do you mean by 'inner-transition elements'?

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

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  3. Why are the cations smaller than atom?

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

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

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

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

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

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

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

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

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

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  13. The Reason for diagonal relationship is -

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

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  15. What are actinones?

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  16. The elements A, B and C have atomic numbers Z -2, Z and Z +1 respecive...

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  17. The elements A, B and C have atomic numbers Z -2, Z and Z +1 respecive...

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  18. Why do transition elements have a greater tendency to form co-ordinate...

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  19. Give four defects of 'Mendeleev's periodic table.

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  20. Consider the following species. N^(3-) , O^(2-) , Na^+ , Mg^(+2) , Al...

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