Why Does Copper Exhibit Two Valencies?

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Copper exhibits two common valencies, +1 and +2, due to its electron configuration and the ability to lose different numbers of electrons. While it has a tendency to form a +1 oxidation state, it can also achieve a +2 state, which is more prevalent in many compounds. Although higher oxidation states like +3 and +4 exist, they are less frequently discussed in basic chemistry education, leading to a focus on the +1 and +2 states. This dual valency is a key characteristic of copper's chemical behavior and its role in various compounds.
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why does copper show 2 valancies??
 
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What do you mean shows 2 valencies?

"In chemistry, valence, also known as valency or valence number, is a measure of the number of bonds formed by an atom of a given element."
 
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I guess Bipix means copper in its compounds can be either +1 or +2. Judging from the valence electrons, it should be +1 only.
 
Well... There are Copper (III) and Copper (IV) as well...
 
Yes, but +1 and +2 are most common, on some levels on education they are the only ones mentioned.
 

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