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The d-And-f-Block Elements
Iron is transition element but sodium is not because of the differentiating electron i.e. last incoming electron in iron acquires 3d orbitals to give [Ar] 3d6, 4s2 configuration with incomplete d-sub-shell, the characteristic of transition. In Na, the differentiating electron occupies 3s1 subshell to give [Ne] 3s1 configuration.
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The outer electronic configuration of copper is 3d10 4s1, yet it is considered transition element. Why?
Name the first element of 3rd transition series.
Though copper, silver and gold have completely filled sets of d-orbitals yet they are considered as transition metals. Why?
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