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Explain why radii of positive ions are a...

Explain why radii of positive ions are always smaller than the radii of corresponding neutral atoms and why negative ions have larger radii than the corresponding neutral atom.

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NCERT BANGLISH-PERIODIC CLASSIFICATION-I-Questions (Explain briefly the following)
  1. Which of the following pairs of elements would have higher electron ga...

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  2. Lanthanides and actinides are placed in separate rows at the bottom of...

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  3. What do you mean by representative elements? Name the groups of the pe...

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  4. Define transition elements. Name the different transition series.

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  5. Which element of the following pairs have smaller ionization enthalpy?...

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  6. Why is Na atom bigger than the atoms of both lithium and magnesium ?

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  7. What do you mean by the term electron gain enthalpy? How does electron...

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  8. Explain how the elements are arranged in the form of the periodic tabl...

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  9. What are normal, transition and inner- transition elements?

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  10. What are the differences between normal and transition elements?

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  11. Explain why radii of positive ions are always smaller than the radii o...

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  12. Explain the size of group Cl^(-1) gt Na^(+) .

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  13. What is electron gain enthalpy? On what factors does it depend?

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  14. Give the general variation of electron gain enthalpies in the periodic...

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  15. Define the term ionic radius. Justify that the radius of anion is larg...

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  16. What do you mean by ionization enthalpy? How does it vary across a per...

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  17. What is meant by electronegativity? On what factors does it depend?

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  18. What are the essential features of the periodic table of Mendeleev? Di...

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