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The atomic sizes of noble gases are by f...

The atomic sizes of noble gases are by far the largest in their respective periods-why?

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Noble gases seldom form compounds. Therefore, their van der Waals radii actually represent their atomic radii In contrast, other members of the corresponding periods form compounds and hence, their covalent radii represent atomic radii. Since van der Waals radii are larger than covalent radii, noble gases have large atomic size in their respective periods.
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Knowledge Check

  • The valency of noble gases is

    A
    1
    B
    2
    C
    0
    D
    3

  • This question has statement I and statement II of the four choices given after the statements choose the one that best describes the two statements Statement -I:noble gases have highest ionization enthalpies in their respective period Statement-II:noble gases have stable closed shell electronic configuration

    A
    Statement-I Is true statement II is true,statement -II is a correct explanation of statement -I
    B
    Statement -I is true statement -II is true .statement -II is not a correct explantion of statement-I
    C
    Statement -I is true statement II is false
    D
    statement I is false statement II is true

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