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The d-And-f-Block Elements
In actinoids, the progressively filling 5f subshell is shielded and is far from the nucleus in comparison to the 4f subshell. Moreover the difference of the energy between 5f 6d and 7s is small. The energy are decided on the basis of (n+1) rule Orbital are as
5f =5+3=8
6d =6+2 =8
7s=7+1 =8
All value comes out same. Hence they have same energy.
Hence, the electrons from 5f subshell takes part in reaction and they all show variable oxidation state.
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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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