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Annie Ye
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Postby Annie Ye » Sun Oct 27, 2019 9:17 pm

2A.21 Give the ground-state electron configuration and number of unpaired electrons expected for each of the following ions: (a) Ca21; (b) In1; (c) Te22; (d) Ag1.

Samuel Tzeng 1B
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Joined: Sat Aug 24, 2019 12:15 am

Re: 2A.21

Postby Samuel Tzeng 1B » Sun Oct 27, 2019 9:21 pm

b.[Kr]5s^2 4d^10

no unpaired electrons for all

Posts: 108
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Re: 2A.21

Postby Sjeffrey_1C » Wed Oct 30, 2019 9:47 pm

You can tell that all of these have 0 unpaired electrons because the last orbitals are full in each case.

Subashni Rajiv 1K
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Joined: Wed Sep 18, 2019 12:16 am

Re: 2A.21

Postby Subashni Rajiv 1K » Wed Oct 30, 2019 10:55 pm

If the last orbital has an odd number of electrons in the configuration, then this is an indication that there is an unpaired electron.

Anthony Hatashita 4H
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Joined: Wed Sep 18, 2019 12:21 am

Re: 2A.21

Postby Anthony Hatashita 4H » Thu Oct 31, 2019 8:11 pm

All of them have no unpaired electrons because the shells are filled, but there are some cases where 3d is filled with 8 electrons, leaving 2 unpaired electrons due to Hund's rule I believe.

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