Q.

Which has maximum Ionization Energy?

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a

Mg

b

Mg+

c

Mg2+

d

All the above ions have same I.E

answer is C.

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Detailed Solution

An electron is lost, effective nuclear charge increases, force of attraction increases. Hence, (IE)1<(IE)2<(IE)3Thus,Mg2+has maximum I.E. The other words we can also say that the ion has inert gas configuration, and its difficult to disturb it.
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Which has maximum Ionization Energy?