Fall 2013 Q2C

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Jane Sin 3A
Posts: 28
Joined: Wed Sep 21, 2016 2:58 pm

Fall 2013 Q2C

Postby Jane Sin 3A » Thu Dec 01, 2016 11:27 pm

Can somebody explain why In+ is the only ground state electron configuration that is not [Kr]4d10? How is Pd [Kr]4d10?

"All of the following can have the ground-state electron configuration [Kr]4d10 except?
Clearly circle your answer."

Cd 2+

( Answer in coursereader is In+ )

Natalie Rotstein 3J
Posts: 20
Joined: Wed Sep 21, 2016 2:59 pm

Re: Fall 2013 Q2C

Postby Natalie Rotstein 3J » Fri Dec 02, 2016 12:14 am

All of the other ones have 10 electrons combined after the [kr] configuration - those electrons could theoretically leave the 5s shell and go to fill the 4d shell instead (that's how Pd can be 4d10). In+, however, has a combined total of 12 electrons after the [kr] configuration, so the configuration would need to be [kr]5s^2,4d^10, not just 4d10

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