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From each set, choose the atom which has...

From each set, choose the atom which has the largest ionization enthalpy and explain your answer with suitable reasons. (a) `F, O, N` (b) `Mg, P, Ar`

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(a) Fluorine `(F)` has the largest ionization enthalpy because in moving from left to right in a period, atomic size decreases and electrons are held more tightly. Since `F` has the smallest size and maximum nuclear charge. It has the largest ionization enthalpy among these elements.
(b) Argon `(Ar)` has the largest ionization enthalpy as argon has extra stable fully filled configuration.
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