Classification Of Elements And Periodicity In Properties Ques 26
26. 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) $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{2}$
Show Answer
Answer:
Correct Answer: 26.(a)
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.
BETA
