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Question

Which of the following d-block element has half-filled penultimate as well as valence subshell?

A
Cu
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B
Au
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C
Ag
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D
Cr
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Solution

The correct option is C Cr
Electron configuration1s22s22p63s23p64s13d5
Valance shell4s1(half filled)
Penultimate shell3d5
Chromium has half filled penultimate as well as valance subshell.

1051625_935135_ans_41dea63898974bb1a809e3bf3620f5f9.jpg

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