Posted by Sheryl on Tuesday, October 17, 2006 at 12:15am.
What is the electronic configuration of carbide C-4?
Thought it was 1s2 2s2 sp2.
Thanks from Sheryl
C is atomic number 6.
Electronic configuration of the neutral atom is 1s2, 2s2, 2p2.
The carbide ion, C^-4, has four more electrons. So the extra four electrons must be added. Where do you think they go?
4 extra valance electrons.
That's the only way it can be C^-4. Now where do they go? What is the electron configuratiion.
1s2 2s2 2p6? I must have been thinking we were doing the periodic table.
Right. And note that the addition of 4 electrons make a full N = 2 level with 8. Note also that the loss of 4 electrons (remember C is in group IV so it can gain four or lose four) it has 1s2 2s0 2p0; i.e., the outside shell (which is now n= 1) is full with its two electrons.
And note also that since C is in group IV and can "gain or lose four electrrons" it usually does neither and shares its electrons in covalent bonds.
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