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The atomic radius increases as we move d...

The atomic radius increases as we move down a group because

A

Effective nuclear charge increases

B

atomic mass increases

C

additive electrons are accommodated in new electron level

D

atomic number increases.

Text Solution

Verified by Experts

The correct Answer is:
C
As we move down a group, additive electrons occupy new energy levels and therefore, atomic radius increases.
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Knowledge Check

  • Ionic radius in a group while moving down

    A
    Remains same from top to bottom
    B
    Decreases from top to bottom
    C
    Increases from top to bottom
    D
    First increases and then decreases.

  • Assertion: Shielding effect increases as we go down the group. Reason: More is the number of electrons in the penultimate shell, more is shielding.

    A
    If both assertion and reason is the correct explanation of assertion.
    B
    If both assertion and reason is the correct explanation of assertion.
    C
    If both assertion and reason is the correct explanation of assertion.
    D
    If both assertion and reason is the correct explanation of assertion.

  • The electropositive first increases from B to Al and then decreases from Al to Tl down the group because of

    A
    non-metallic nature of B
    B
    discrepancies in atomic size of elements
    C
    ability of B and Al to form `p pi - p pi` multiple bonds
    D
    irregular trend in electronegativity throughout the periodic table.

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