Amongst the following elements (whose electronic configuration are given below),the one having the highest ionization energy is:
Correct answer: B. [Ne] 3s2 3p3
- A. [Ne] 3s2 3p1
- B. [Ne] 3s2 3p3
- C. [Ne] 3s2 3p2
- D. [Ar] 3d10 4s2 4p1
Explanation
Ionization energy increases as a shell fills. Half filled or completely filled orbitals are very stable and so it is difficult to ionize such elements having half-filled or completely filled shells. In 3d subshell maximum 10 electrons can be accomodated. In [Ne] 3s2 3p3 , the valance shell is half filled so it has higher ioniztion energy. Therefore, option B is the correct answer.
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Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
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