1.

Krypton \[{{(}_{36}}Kr)\] has the electronic configuration \[{{(}_{18}}Ar)\] \[4{{s}^{2}},3{{d}^{10}},4{{p}^{6}}\]. The \[{{37}^{th}}\] electron will go into which one of the following sub-levels [CBSE PMT 1989; CPMT 1989; EAMCET 1991]

A.                 \[4f\]    
B.                 \[4d\]
C.                 \[3p\]   
D.                 \[5s\]
Answer» E.


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