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How does the atomic radius change as we ...

How does the atomic radius change as we go :
(i) from left to right across a period
(ii) down a group in the periodic table ?

Text Solution

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On going :
(i) From left to right across a period, atomic radius decreases as one proton and one electron are added continuously, therefore effective nuclear charge increases.
(ii) Down a group in the periodic table, atomic radius increases because number of shells goes on increasing, therefore distance between nucleus and valence shell increases.
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Knowledge Check

  • When we move from left to right across a period, the electron affinity

    A
    Remain the same
    B
    Approach Zero
    C
    Decreases
    D
    Increases

  • Which parameter decreases as we move from left to right along a period?

    A
    metallic character
    B
    valence electrons
    C
    electronegativity
    D
    electron shells

  • Which of the following statements is not a correct statement about the trends when going from left to right across the periods of the periodic table?

    A
    The elements become less metallic in nature
    B
    The number of valence electrons increases
    C
    The atoms lose their electrons more easily
    D
    The oxides become more acidic

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