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Why do atomic radii increase down the gr...

Why do atomic radii increase down the group ?

Text Solution

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Atomic radii increase down a group due to increase in valence shell as the distance between the valence shell and the nucleus increases .
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Knowledge Check

  • Assertion : Ionization energy increase does the group. Reason : Atomic size increases down the group.

    A
    Both Assertion and Reason are ture and Reason is correct explanation of Assertion.
    B
    Both Assertion and Reason are true but Reason is ot the correct explanation of Assertion.
    C
    Assertion is true but Reason is false.
    D
    Assertion is false but reason is true.

  • Assertion : H_(2)O is the only hydride of chalcogen family . Reason : Acidic nature of hydrides of chalcogen family increases down the group .

    A
    Both assertion and reason are true and reason is the correct explanation of the assertion
    B
    Both assertion and reason are true and reason is not the correct explanation of the assertion.
    C
    Assertion is true but reason is false
    D
    Both assertion and reason are false.

  • In a group with decrease in electronegativity the metallic character (a) decreases across a period (b) ncreases down the group (c ) does not very

    A
    a only
    B
    b only
    C
    both (a) and (b)
    D
    c only

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    What is the periodic trend observed in the variation of atomic radii down a group?

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