Classification of Elements and Periodicity in Properties - Result Question 32
####32. Of the given electronic configurations for the elements, which electronic configuration indicates that there will be abnormally high difference in the second and third ionization energy for the element?
(a) $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2}$ (b) $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{1}$
(c) $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{1}$ (d) $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{2}$
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Solution:
- (a) $Mg=1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2}$
After the removal of 2 electrons, the magnesium ion will acquire noble gas configuration hence removal of 3rd electron will require large amount of energy.
