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Ionisation enthalpy for the elements of Group 13 follows the order.
Answers (1)
The answer is the option l
The ionization energy decreases on moving down a group, and the atomic size increases. Till Ga, the ionization energy increases slightly but soon starts decreasing due to the shielding effect of d-electrons and increases once the shielding effect is less. Thus the nuclear energy increase when the ionization energy rises.
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