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Question

Which of the following statement is wrong ?

A
The first ionization potential of Al is less than the first ionization potential of Mg.
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B
The second ionization potential of Mg is greater than the second ionization potential of Na.
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C
the first ionization potential of Na is less than the first ionization potential of Mg.
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D
The third ionization potential of Mg is greater than the third ionization potential of Mg.
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Solution

The correct option is B The second ionization potential of Mg is greater than the second ionization potential of Na.
Na(z=11):1s2,2s2,2p6,3s1
Na+=1s2,2s2,2p6
After losing the first electron, sodium acquires a very stable noble gas configuration. therefore, its second ionization potential is very high. So, it is incorrect to say that the second to say that the second ionization potential of Mg is greater than the second ionization potential of Na.


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