why is copper considered as transition element and zinc is not even though both has 3d^10 as outermost electronic configuration
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In Cu atom (3d104s1) the 3d10 1s completely filled but in its Cu2+ ion (3d94s0) one of the 3d-orbitals is only half filled. Therefore, copper is a transition elements. ... Therefore, zinc is not considered as a true transition element, but its electronic configuration does not fit in the quantum mechanical definition.
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what about zinc
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.When it forms ions, it always loses the 3 outer electrons and ends up with an argon structure. The Sc3+ ion has no d electrons and so doesn't meet the definition. Zinc has the electronic structure [Ar] 3d104s2. Copper is definitely a transition metal because the Cu2+ ion has an incomplete d level.
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