Question : The correct electronic configuration of Cu is:
Option 1: [Ar]3 d9 4 s2
Option 2: [Kr]3 d9 s2
Option 3: [Kr]3 d10 s1
Option 4: [Ar]3 d10 4 s1
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Correct Answer: [Ar]3 d 10 4 s 1
Solution : The correct answer is [Ar]3 d 10 4 s 1
The correct electronic configuration of copper (Cu) is:
Cu:1s 2 2s 2 2p 6 3s 2 3p 6 4s 1 3d 10
Copper has an atomic number of 29, and its electron configuration fills the subshells in a way that optimizes stability, leading to an anomalous configuration where one electron is in the 4s orbital instead of the expected 3d orbital.
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