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Electronic configurations of Cu and Cr?

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Electronic configurations of Cu and Cr?

Posted by Kompu Taid 3 years, 11 months ago

CBSE > Class 11 > Chemistry

2 answers

Gaurav Seth 3 years, 11 months ago

The Electronic configuration of Cr and Cu are given below ⇒

1. Cr = 24 = 1s² 2s² 2p⁶ 3s² 4p⁶ 4s¹ 3d⁵

2. Cu = 29 = 1s² 2s² 2p⁶ 3s² 4p⁶ 4s¹ 3d¹⁰

These electronic configuration are exceptional because electrons entered in 3-d orbitals without filling the 4s orbitals complete.

Reason for the Exceptions ⇒ It is said that d orbitals can be stable if it is half filled or full filled.

Thus, In the given case, electrons reaches near the half filled and full filled thus due to the attraction one electrons from the s orbitals came in d orbitals.

Yogita Ingle 3 years, 11 months ago

Electronic configuration of Chromium, with atomic number 24=1s²2s²2p⁶3s²3p⁶4s¹3d⁵.

Electronic configuration of Copper, with atomic number 29=1s²2s²2p⁶3s²3p⁶4s¹3d¹⁰.

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