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Valency and Oxidation States

manganese sho...

Question

manganese show maximum no. Of oxidation state among the3d series of transition elements?

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Solution

Mn has the maximum number of unpaired electrons present in the d -subshell (5 electrons). Hence, Mn exhibits the largest number of oxidation states, ranging from +2 to +7.

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Similar questions

Q. (i) Why do transition elements show variable oxidation states?
(ii) Name the element showing maximum number of oxidation states among the first series of transition metals from

S c (Z = 21)

Z n (Z = 30)

.
(iii) Name the element which shows only

+ 3

oxidation state.
(iv) What is lanthanoid contraction? Name an important alloy which contains some of the lanthanoid metals.

The transition series that possess elements with maximum oxidation state of +8:

Q. The elements of 3d transition series are given as:

\begin{matrix} S c & T i & V & C r & M n & F e & C o & N i & C u & Z n \end{matrix}

Answer the following:
(i) Write the element which is not regarded as a transition element. Give reason.
(ii) Which element has the highest m.p.?
(iii) Write the element which can show an oxidation state of +1.
(iv) Which element is a strong oxidizing agent in +3 oxidation state and why?

Transition elements show positive oxidation state, generally, due to:

Q. The elements of 3d transition series are given as:Sc, Ti, V, Cr, Mn, Fe, Co
Answer the following:
(i) Write the element which shows maximum number of oxidation states. Give reason.

(ii) Which element has the highest m.p.?
(iii) Which element shows only +3 oxidation state?
(iv) Which element is a strong oxidising agent in +3 oxidation state and why?

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