Question 9: Write the electron configurations for the following ions and determine which have Nobel gas configurations: a. Ru$^{3+}$ b. As$^{3-}$ c. Y$^{3+}$ d. Pd$^{2+}$ e. Pb$^{2+}$ f. Au$^{3+}$
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Ru3+: The electron configuration of Ru is [Kr] 5s2 4d7. When it loses 3 electrons to become Ru3+, it becomes [Kr] 4d5. This is not a noble gas configuration. b. As3-: The electron configuration of As is [Ar] 4s2 3d10 4p3. When it gains 3 electrons to become As3-, Show more…
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