Question

why copper has two valency and explain its electronic configuration​

Answer 1

Explanation:

According to Aufbau Principle, 4s orbital is filled before 3d orbital. Copper is one of the transition elements and thus exhibits variable oxidation states. It has two valencies: +1 and +2 and the corresponding atoms are termed as Cuperous (+1 valency) and Cupric (+2 valency).

Electronic Configuration of Copper:

$3d^{10} 4s^{1}$

Answer 2

Answer:

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