JEE Main 9 Jan 2020 Shift 1 Solved Paper
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Question : 45 of 75
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The electronic configurations of bivalent europium and trivalent cerium are
(atomic number : Xe = 54, Ce = 58, Eu = 63)
(atomic number : Xe = 54, Ce = 58, Eu = 63)
[9 Jan 2020 Shift 1]
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