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How the presence of d-orbitals affect size?

  1. Mar 5, 2010 #1
    In my textbook , it is given that Atomic radius of Ga is smaller than that of Al due to presence of d-orbitals in Ga.
    But how does the presence of d-orbitals reduces size?
     
  2. jcsd
  3. Mar 5, 2010 #2

    Char. Limit

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    But it's not...

    The atomic radius of Aluminum is 125 pm. The atomic radius of Gallium is 135 pm.
     
  4. Mar 5, 2010 #3
    No, i refered wikipedia article...Atomic radius of aluminium is 143 pm
     
  5. Mar 5, 2010 #4

    Char. Limit

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  6. Mar 10, 2010 #5
    Which website is true ?I am really confused .:confused:
     
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