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(C) The transition elements are defined as elements having partially filled $d$-orbitals in their ground state or in any of their oxidation states.The

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$60$

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(C) The transition elements are defined as elements having partially filled $d$-orbitals in their ground state or in any of their oxidation states.There are approximately $60$ transition elements out of the total known elements.Percentage of transition elements $= (	ext{Number of transition elements} / 	ext{Total number of elements}) 	imes 100$.Taking the total number of elements as approximately $105$ and the number of transition elements as $61$,the calculation is $(61 / 105) 	imes 100 \approx 58.1\%$,which is approximately $60\%$.

Approximately what percentage $(\%)$ of the total elements are transition elements?

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