The element Cu with atomic number 29 undergoes chemical reaction to form an ion with oxidation number +2. a) Write down the subshell electronic configuration of this ion? b) Can this element show variable valency? Why? c) Write down the chemical formula of one compound formed when this element reacts with chlorine (17Cl).
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+2 ion. Copper is one of the transition elements and it exhibits variable oxidation states. It has variable valencies: +1 and +2. The ion with valency +1 is called Cuprous and and the ion with valency +2 is called
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