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State modern periodic law of classificat...

State modern periodic law of classification of elements.

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ICSE-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES-SHORT ANSWER TYPE QUESTIONS
  1. State Mendeleev.s periodic law.

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  2. State modern periodic law of classification of elements.

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  3. Mention the group, period and block to which each of the following ele...

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  4. Mention the group, period and block to which each of the following ele...

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  5. Mention the group, period and block to which each of the following ele...

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  6. An element possesses electronic configuration 1s^(2)2s^(2)2p^(6)3s^(2)...

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  7. Writer four characteristic properties of p-block elements.

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  8. What are transition elements ? Mention their characteristic properties...

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  9. Explain the term periodicity in properties of elements

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

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

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

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

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

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  15. Why is anion larger than its parent atom ?

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

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

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

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

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

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