Interpretation: The configuration of the highest occupied energy level for the krypton element needs to be identified.
Concept Introduction: The electronic configuration represents the arrangement of electrons in atomic orbitals. Here, s , p , d, and f are sublevels in which electrons are distributed. The maximum number of electrons in s , p , d, and f orbitals are 2, 6, 10, and 14.
Answer to Problem 9STP
The correct option is (A).
Explanation of Solution
Reason for correct option:
The given element is krypton. The
Thus, the filling of electrons takes place in the order s , p , d, and f .
The electronic configuration can be represented as follows:
This can be rewritten as follows:
Thus, the highest occupied energy level is
Therefore, option (A) is correct.
Reason for incorrect options:
The electronic configuration of krypton is as follows:
The increasing order of energy with respect to principal quantum number is as follows:
Thus, the highest occupied energy level will be with principal quantum number 4. From the electronic configuration, there are two sublevels with this principal quantum number that is
Therefore, options (B), (C), (D) and (E) are incorrect options.
Chapter 5 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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