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| 1. |
Which of the 3d series of the transition metals exhibits the largest number of oxidation states and why ? |
| Answer» SOLUTION :Manganese (Z = 25) SHOWS maximum number of oxidation states because of its electronic configuration `3D^(5)4s^(2)`. As 3d and 4s are close in energy, it has maximum number of electrons to lose or share (as all the 3d electrons are unpaired). HENCE, it shows maximum oxidation states from `+2` to `+7(+2,+3,+4,+5,+6" and "+7)`. | |