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How would you explain the fact that the ...

How would you explain the fact that the first ionisation enthalpy of sodium is lower than that of magnesium but its second ionisation enthalpy is higher than that of magnesium?

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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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