Interpretation: The correct electron configuration for silicon,
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 1STP
The correct option is (D).
Explanation of Solution
Reason for correct option:
The given element is silicon. The atomic number of silicon is 14; thus, there are 14 electrons in a silicon atom. The increasing order of energy of sublevels is as follows:
Thus, the filling of electrons takes place in the order s , p , d, and f .
The electronic configuration can be represented as follows:
Therefore, option (D) is correct.
Reason for incorrect options:
The electronic configuration given in option (A) is as follows:
Since the maximum number of electrons hold by p and d orbitals are 6 and 10 respectively also, first, lower energy sublevels are filled then the filling of a new sublevel takes place,
The electronic configuration given in option (B) is as follows:
Here,
The electronic configuration given in option (C) is as follows:
Here, 2s orbital is filled incorrectly. The maximum number of electrons s sublevel can hold is 2. Thus, it cannot have 6 electrons and the above configuration is incorrect.
Therefore, options (A), (B), and (C) are incorrect.
Chapter 5 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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