The principal quantum number for the outermost electrons in a Cl atom in the ground state...
The principal quantum number for the outermost electrons in a Cl atom in the ground state is ________.
Which one is correct?
A. 2
B. 3
C. 5
D. 4
E. 1
Homework Answers
The electronic configuration of Cl atom is 1s2 2s2 2p63s2 3p5.
The last electron of Cl atom is in 3p orbital as shown in the above electronic configuration. Therefore, the principal quantum number for outermost electron is 3. Option B is correct.
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