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In class, Dr. Lavelle mentioned that Copper and Chromium are strange exceptions and they fill up (or half fill up) their d-subshell before the s-subshell because that is the configuration with the lowest energy. I was wondering if this also applies to Ag and Mo as well? Thank you!
Yes, the same rule applies to those elements as well. The Mo configuration is 4d^5 5s^1 and the Ag configuration is 4d^10 5s^1. I would recommend that you look at a Periodic Table that provides the electron configuration (such as the one in our textbook) because those are not the only two that have surprising configurations in that row.
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