why d block elements are named as 'transition elements'?
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Answer:
read textbook...........
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Explanation:
D-block elements also have a unique feature: the ability of their valence electrons to occupy the inner subshells, due to an increase in the number of subshells.
This allows for transitions in valency and oxidation states as valence electrons, may not always be present in the outermost orbital.
Example:
Fe 2+, Fe 3+
Cu 1+, Cu 2+
Pb 2+, Pb 4+
This characteristic could also be the reason they are called transition elements.
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