Chemistry-Ionization Energy
NEET Chemistry Ionization Energy MCQ Question
Type: MCQ-diagram based-Medium-Class 11
Consider a diagram illustrating the ionization energy trend across the second period of the periodic table. The trend shows a general increase, but there are exceptions. Which elements in this period have ionization energies that defy the typical trend, and why?
A
Beryllium and Oxygen, due to their electronic configurations
B
Lithium and Neon, due to their atomic sizes
C
Boron and Nitrogen, due to their electronegativities
D
Carbon and Fluorine, due to their shielding effect
Correct Answer
Option A
Detailed Explanation
Beryllium has a higher ionization energy than Boron due to its filled s-orbital, and Oxygen has a lower ionization energy than Nitrogen due to electron-electron repulsion in its p-orbital.
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