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JEE Main Chemistry question

ChemistrySome Basic Concepts of ChemistryJEE Main

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

Answer: (A)

Solution

The standard atomic weights are approximately Co = 58.93 u, Ni = 58.69 u and Fe = 55.85 u, giving the decreasing order — a

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Question ID VK-147378