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Question
Which element among the following has highest number of unpaired electrons in observed electronic configuration?
Options
Scandium (Z = 21)
Copper (Z = 29)
Titanium (Z = 22)
Chromium (Z = 24)
MCQ
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Solution
Chromium (Z = 24)
Explanation:
| No. of unpaired electrons | |
| 21Sc = [Ar] 3d1 4s2 | 1 |
| 22Ti = [Ar] 3d2 4s2 | 2 |
| 24Cr = [Ar] 3d5 4s1 | 6 |
| 29Cu = [Ar] 3d10 4s1 | 1 |
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Electronic Configuration
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