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Which of the group 13 elements has the h...

Which of the group `13` elements has the highest ionization enthalpy?

A

`Al`

B

`Ga`

C

`In`

D

`Tl`

Text Solution

Verified by Experts

The correct Answer is:
A
The overall order is
`Tl gt In gt Ga gt Al`
on account of the decrease of effective nuclear charge.
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