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The orbit angular momentum of 3d and 4d are:

Assertion: The metals of 4d and 5d greater entalpies of atomisation than the corresponding elements of the 3d series. Reason: The metal-metal bond in 4d and 5d series are stronger than those in the 3d series.

State the reason for the following : (i) Cu (I) ion is not stable in an aqueous solution. (ii) Unlike Cr^(3+),Mn^(2+),Fe^(3+) and the subsequent other M^(2+) ions of the 3d series, the 4d and 5d series metals generally do not form stable oxidation states.

which set of quantum number correspond t an eletron in a 4d orbital?

How many nodal planes are present in 4d_(z^(2)) ?

Some of the following sets of quantum numbers are incorrect for d 4d electron. Which are the incorrect sets?