The spin only magnetic moment of a divalent ion in aqueous solution (atomic number 29) is _________ BM.

Considering that $$\Delta $$₀ > P, the magnetic moment
(in BM) of [Ru(H₂O)₆]²⁺ would be _________.

The total number of coordination sites
in ethylenediaminetetraacetate (EDTA^4–) is _____.

The oxidation states of iron atoms in compounds (A), (B) and (C), respectively, are x, y and z. The sum of x, y and z is ________.

Na₄[Fe(CN)₅(NOS)]
       (A)

Na₄[FeO₄]
       (B)

[Fe₂(CO)₉]
       (C)