Account the following
The `d^(1)` - configuration is very unstable in ions

How would you account for the following ? (i) Copper (I) is diamagnetic, whereas copper (II) is paramegnetic. (ii) What is the common oxidation state of Cu, Ag Au ? (iii) The d^(1) configuration is very unstable in ions.

Account of the following. (i) The enthalpy of atomisation is lowest for Zn in 3d -series of the transition elements. (ii) Identify the metal in MO_(3)F and justify your answer. (iii) Transition metals form a large number of complexes. (iv) d^(1) configuration is very unstable in ions.

Almost the following elements the configuration having the highest ionization energy is :

Account the following The IE_(1) of Cr is low, whereas IE_(1) for Zn is very high

Among the following outermost configurations of transition which shows the highest oxidation state:

Account for the following : There are irregularities in the electronic configuration of actinoids.