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The d-And-f-Block Elements
The +3 oxidation states of lanthanum (Z = 57), gadolinium (Z = 64) and lutetium (Z = 71) are especially stable. Why?
The electronic configuration of Lanthanum(57) 5d16s2 4f0 Lutetium (71)4f14 5d1 6s2 and Godolinium(64) 4f7 5d1 6s2 . Hence they have empty, completely and half filled filled 4f subshell thus there +3 oxidation state is stable.
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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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