Compare the stability of +2 oxidation state for the elements of the fi

1.	Compare the stability of +2 oxidation state for the elements of the first transition series.
Answer» i. In the beginning of 3d transition series, Sc²⁺ is virtually not known or in other words it is not stable in comparison to Sc³⁺. Ti²⁺, V²⁺, Cr²⁺ are known but less stable in comparison to their most common oxidation state of +3. ii. In the middle of the 3d transition series, Mn²⁺, Fe²⁺, Co²⁺ are known and quite common. Mn2+ and Mn⁷⁺ are most stable in Mn. Fe²⁺is less stable in comparison to Fe³⁺, due to fact that Fe²⁺ tends to lose one electron to acquire d⁵ structure, which has extra stability. iii. Co²⁺ is less stable as compared to Co³⁺. Ni²⁺ is most common and most stable among its +2, +3 and +4 states. Cu+ is more stable and is most common species as compared to Cu²⁺. iv. At the end of the 3d transition series, Zn forms only Zn²⁺ which is highly stable as it has 3d¹⁰ configuration.

Compare the stability of +2 oxidation state for the elements of the first transition series.

Answer»

i. In the beginning of 3d transition series, Sc²⁺ is virtually not known or in other words it is not stable in comparison to Sc³⁺. Ti²⁺, V²⁺, Cr²⁺ are known but less stable in comparison to their most common oxidation state of +3.

ii. In the middle of the 3d transition series, Mn²⁺, Fe²⁺, Co²⁺ are known and quite common. Mn2+ and Mn⁷⁺ are most stable in Mn. Fe²⁺is less stable in comparison to Fe³⁺, due to fact that Fe²⁺ tends to lose one electron to acquire d⁵ structure, which has extra stability.

iii. Co²⁺ is less stable as compared to Co³⁺. Ni²⁺ is most common and most stable among its +2, +3 and +4 states. Cu+ is more stable and is most common species as compared to Cu²⁺.

iv. At the end of the 3d transition series, Zn forms only Zn²⁺ which is highly stable as it has 3d¹⁰ configuration.

Compare the stability of +2 oxidation state for the elements of the first transition series.

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