How many of the following contains either half-filled or full filled "f-subshell" (inner/valency shell) in their ground state electronic configuration?
$Pm$ $Eu$ Gd Ho $Yb$ $Lu$ $U$ $Cm$ No and Lr

Question

How many of the following contains either half-filled or full filled "f-subshell" (inner/valency shell) in their ground state electronic configuration? Pm Eu Gd Ho Yb Lu U Cm No and Lr

TestHub · Accepted Answer

Pm : 4 f 5 6 s 2 Eu : 4 f 7 6 s 2 Gd : 4 f 7 5 d 1 6 s 2 Ho : 4 f 11 6 s 2 Yb : 4 f 14 6 s 2 Lu : 4 f 14 5 d 1 6 s 2 U : 5 f 3 6 d 1 7 s 2 [ 4 f 14 is filled ] Cm : 5 f 7 5 d 1 7 s 2 No : 5 f 14 7 s 2 Lr : 5 f 14 6 d 1 7 s 2

Chemistry - f-block Question with Solution | TestHub

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