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The radius of Na^(+) cation is less than...

The radius of `Na^(+)` cation is less than that of Na atom. Give reason.

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Statement-1: Na^(+) and AI^(3+) are isoelectronic but the magnitude of ionic radius or AI^(3+) is less than that of Na^(+) . Statement-2: The magnitude of effective nuclear charge of the outer most shell electrons in AI^(3+) is greater than that of Na^(+) .

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PRADEEP-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES -NCERT (EXEMPLAR PROBLEMS) (SHORT ANSWER QUESTIONS)
  1. Electron gain enthalpy of fluorine is less than that of chlorine. Why?

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  2. All transition element are d- block element but all d- block elem...

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  3. Identify the group nad valency of the elements having atomic number 11...

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  4. Ionisation enthalpies of element of second period are given belo...

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  5. Among the elements B, AI,C and Si, (i) Which elements has the highes...

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  6. Write four characteristic properties of p- block elements

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  7. Choose the correct order of atomic radii of fluorine and neon (in...

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  8. Illustrate by taking examples of transition elements and non-transitio...

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  9. Nitrogen has positive electron gain enthalpy whereas oxygen has negati...

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  10. First member of each group of representative elements (i.e., s and p-b...

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  11. p-Block element form acidic basic and amphoteric oxides . Expla...

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  12. How would you explain the fact that the first ionisation enthalpy of s...

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  13. What do you undestand by exothermic reaction and endothermic reaction?...

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  14. Arrange the elements N, P, O and S in the order of i) increasing fir...

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  15. Explain the following a) Electronegatively of elements increase on m...

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  16. How does the metallic and non-metalic character vary on moving from le...

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  17. The radius of Na^(+) cation is less than that of Na atom. Give reason.

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  18. Among alkali metals which element do you expect to be least electroneg...

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