why transition Element show various oxidation state?
Answers
Answer:
These elements show variable oxidation state because their valence electrons in two different sets of orbitals, that is (n-1)d and ns. The energy difference between these orbitals is very less, so both the energy levels can be used for bond formation. Thus, transition elements have variable oxidation states.
Explanation:
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Answer:
1.Transition elements show variable state oxidation in their compounds because there is a very small energy difference in between (n-1)d and ns orbitals. As a result, electrons of (n-1)d orbitals as well as ns-orbitals take part in bond formation.
2. Mn(Z-25) has the maximum number of unpaired electrons present in the d-subshell so it shows maximum oxidation states(+7)
3. Sc only exhibits a +3 oxidation state in these series.
4.The lanthanide contraction, i.e. the reduction in size of the Ln
3+
ion from La
3+
(103 pm) to Lu
3+
(86.1 pm), is often explained by the poor shielding of the 5s and 5p electrons by the 4f electrons.An alloy is a solid solution of two or more elements in a metallic matrix. It can either be a partial solid solution or a complete solid solution. Alloys are usually found to possess different physical properties than those of the component elements.An important alloy of lanthanoids is Mischmetal. It contains lanthanoids (94−95%), iron (5%), and traces of S, C, Si, Ca, and Al.