JEE Mains 28-July-2022 Shift 2 Solved Paper
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Question : 68 of 90
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Which of the following pair is not isoelectronic species?
(At. no. Sm, 62; Er, 68; Yb, 70; Lu, 71; Eu, 63; Tb, 65; Tm, 69)
(At. no. Sm, 62; Er, 68; Yb, 70; Lu, 71; Eu, 63; Tb, 65; Tm, 69)
[28-Jul-2022-Shift-2]
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