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JEE CHEMISTRY MCQ: d & f- BLOCK ELEMENTS

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Which of the following is the correct sequence of atomic weights of given elements?

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Correct option: A

\mathrm{Co} > Ni > Fe

Option A (

\mathrm{Co} > Ni > Fe

) is correct because the atomic weights are approximately Co (58.9), Ni (58.7), and Fe (55.8), thus Co > Ni > Fe.

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{Sm}^{3+}

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\mathrm{Ti}{\mathrm{O}_2}

\mathrm{BaS}{\mathrm{O}_4}