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electron ion configuration
References Use the References to access important values if needed for this question 3A 4A c - z - Na Mg 38 40 50 60 70 88 -
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Answer #1

Fe (II) electronic configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d4

Co (II)noble gas configuration : [Ar] 3d7

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