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Explain why : Crystal radius is larger...

Explain why :
Crystal radius is larger than covalent radius.

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ICSE-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES-SHORT ANSWER TYPE QUESTIONS
  1. What are transition elements ? Mention their characteristic properties...

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  2. Explain the term periodicity in properties of elements

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  3. Explain why : Crystal radius is larger than covalent radius.

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  4. Give reason Atomic size decreases across a period but increases down...

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  5. Arrange with explanation the following ions in the increasing order of...

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  6. Arrange the following ions in the decreasing order of their sizes and ...

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  7. Define ionisation energy . What is its value for a hydrogen atom ?

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  8. Why is anion larger than its parent atom ?

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  9. Define valency. How does it change across a period and on going down a...

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  10. Why is the second ionisation energy of an element much greater than it...

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  11. Explain what do you understand by screening effect. How does this effe...

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  12. Arrange with explanation the following elements in the increasing orde...

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  13. Why do the alkali metals possess minimum and the noble gases maximum i...

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  14. Why is the ionisation energy of beryllium greater than that of Li and ...

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  15. Why does the ionisation energy decrease on going down a group?

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  16. Among the elements of second period pick out the element with the m...

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  17. Among the elements of second period pick out the element with the mo...

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  18. Among the elements of second period pick out the element with the l...

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  19. Among the elements of second period pick out the element that is th...

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  20. Among the elements of second period pick out the element that is the...

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