Write the electronic configuration of the following:

Cl, Cr, Nb

1. Chlorine (Cl):  
   Atomic number = 17  
   Electronic configuration = \( 1s^2 \, 2s^2 \, 2p^6 \, 3s^2 \, 3p^5 ___ ________ _____ ___ _______ _______.
_______ _________ ______ ____ _____ _________ _____ ___ ______ ___.
_____ _________ ________ _______ ____ _________ _______ _____ ___.
___ ____ ______ _____ __________ ________.
_______ _________ _____ _________ _______.
___ _________ ____ ______ _______ ____ ______ ___ _______.
_____ ______ _______ _________ ________ ________ ________ ____ _______ ______.
_____ _______ _____ _________ _______ __________ ___ ______ ______ __________.
____ ___ _______ ________ _________ ______ ______.
_________ ________ _________ ___ __________ ____ ___ _________ ____.
_________ _________ ____ ____ ______ _________ _______ ____ _______ __________.
____ ________ ______ __________ ___.
__________ _____ __________ _______ ________ ________ ___ __________.
___ _______ ________ ________.
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