Question:

The correct order of electronegativity of group 13 elements is

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Electronegativity decreases as you go down a group because atomic size increases, which reduces the ability of the nucleus to attract bonding electrons.
Updated On: Jun 6, 2025
  • B > Ga > Al > Tl > In
  • B > Al > Tl > Ga > In
  • B > Al > Ga > In > Tl
  • B > Tl > In > Ga > Al
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The Correct Option is C

Solution and Explanation

The electronegativity of group 13 elements decreases as we move down the group. B has the highest electronegativity, followed by Al, Ga, In, and Tl. Thus, the correct order is B > Al > Ga > In > Tl.
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