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D Block — Easy JEE chemistry MCQ

The electronic configuration of $Cu$ (Z=29) is:
  1. A. $[Ar]3d^{10}4s^1$
  2. B. $[Ar]3d^94s^2$
  3. C. $[Ar]3d^{10}4s^2$
  4. D. $[Ar]3d^84s^2$

Solution

Cu has an exceptional configuration due to extra stability of completely filled d-orbital: $[Ar]3d^{10}4s^1$

CHEMISTRY

easy • PYQ Reworded
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The electronic configuration of CuCu (Z=29) is:
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D Block — Easy JEE Chemistry MCQ | MyGoalPrep