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Which element of the following pairs hav...

Which element of the following pairs have smaller ionization enthalpy? (a) Ca or Be , (b) Ca or K , (c) Cl or I. Justify your answer.

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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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