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7. Which of the following electron configurations is incorrect? a) Ga3+: [Ar]3d10 b) Sn2+: [Kr]5s24d10 c)...

7. Which of the following electron configurations is incorrect? a) Ga3+: [Ar]3d10 b) Sn2+: [Kr]5s24d10 c) Al+: [Ne]4s2 d) Fe2+: [Ar]3d5 e) Bi3+: [Xe]6s24f145d10

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