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Why is ion more stable than ion? (Atomic number of and ) Trivalent Lanthanoid ions such as ( ) and…
(i)[1.0]
Why is $\text{Mn}^{2+}$ ion more stable than $\text{Fe}^{2+}$ ion?
(Atomic number of $\text{Mn} = 25$ and $\text{Fe} = 26$)
(ii)[1.0]
Trivalent Lanthanoid ions such as $\text{La}^{3+}$ ($Z = 57$) and $\text{Lu}^{3+}$ ($Z = 71$) do not show any colour in their solution. Give a reason.
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From ISC 2024 Chemistry Paper 1, question 11.