First slide

Periodicity in atomic properties

Question

Which one of the elements with the following outer orbital configurations may exhibit the largest number of oxidation states

Moderate

A

$3 d^{3} 4 s^{2}$
B

$3 d^{5} 4 s^{1}$
C

$3 d^{5} 4 s^{2}$
D

$3 d^{2} 4 s^{2}$

Solution

The configuration $3 d^{5} 4 s^{2}$ can have various oxidation states upto + 7.

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