Short Answer TypeGive Possible reason for the fact that the radii of Mn2+ ions of the first row transition metals. Ti2+ (Z = 22) to Cu2+ (Z = 29) decrease with increasing atomic number.
The radii M2+ ions decrease from Ti2+ Cu2+. This is due to the following reasons:
(i) The nuclear charge increases in going from Ti to Cu.
(ii) The added electrons enter the same inner 3d orbitals. The net effect of these factors is a greater inward pull on the electron shell and therefore reduction in size.
Explain the catalytic action of Fe(III) between the reaction of I– and persulphate ion S2O82–.
What can be inferred from the magnetic moment values of the following complex species?
|
Example |
Magnetic Moment (BM) |
|
K4[Mn(CN)6] |
2.2 |
|
[Fe(H2O)6]2+ |
5.3 |
|
K3 [Mn Cl4] |
5.9 |
Long Answer TypeShort Answer TypeWhy are transition metal fluorides ionic in nature, whereas bromides and chlorides are covalent in nature.
Why are the ionization enthalpies of 5d elements greater than those of 3d and 4d elements?
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