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Topic: valence and 3d electrons  (Read 4768 times)

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Offline Morphic flip

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valence and 3d electrons
« on: March 12, 2006, 09:15:50 AM »
Am I correct in thinking? :
Cr2+ is 3d 4 and has 6 valence electrons
Cr is 3d6 and has 6 valence electrons
Cr2- is 3d8 and has 6 valence electrons
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Offline Mitch

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Re:valence and 3d electrons
« Reply #1 on: March 12, 2006, 01:34:22 PM »
Strange, how you missed the easy neutral atom case. The electron configuration can be found in our Periodic Table.
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Offline Morphic flip

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Re:valence and 3d electrons
« Reply #2 on: March 12, 2006, 01:56:05 PM »
I thought the neutral atom was [Ar]3d6 like the valency was equal to the number of `d` electrons?
Out of the 3 combinations, are they all correct or some wrong?
Thank`s.
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Offline Mitch

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Re:valence and 3d electrons
« Reply #3 on: March 12, 2006, 02:35:49 PM »
Thje neutral is [Ar]4s23d4
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Offline Morphic flip

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Re:valence and 3d electrons
« Reply #4 on: March 12, 2006, 03:16:41 PM »
hmmmm, I`m going to go back and re-read the basics again.
Thank`s.
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Offline xiankai

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Re:valence and 3d electrons
« Reply #5 on: March 13, 2006, 12:04:37 AM »
my lecturer taught that extra stability is associated with a d subshell with 5 electrons, or each electron occupying its own orbital.

does that not make the neutral state of chromium 4s1 3d5  ???
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JonathanW

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Re:valence and 3d electrons
« Reply #6 on: March 16, 2006, 09:08:04 PM »
Yeah, Cromium(as with copper[and everything in the same columns as those two elements]) is an exception, in that you take an electron from your corresponding energy level, and add it in order to make it more stable. Correct?

Jonathan
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