Which one of the following relations is correct with respect to first (I) and second (II) ionization potentials of sodium and magnesium?
A
INa>IMg
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B
IMg=IINa
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C
IIMg>IINa
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D
IINa>IIMg
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Solution
The correct option is DIINa>IIMg After losing one electron sodium acquires stable noble gas configuration and thus second ionization potential of sodium is very large .