Electron configurations for the third and fourth periods | Chemistry | Khan Academy
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- Опубликовано: 27 июн 2014
- How to write the electron configurations for elements in the third and fourth periods of the periodic table. includes using noble gas notation. Created by Jay.
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I am wondering why for Potassium you skipped 3d, which I thought follows 3p, and filled 4s instead. Could you please advise.
3d is the first row of transition metals, which comes after 4s.
He went to 4s because the 4s orbital has a slightly lower energy level than the 3d orbitals, and electrons always want to fill the orbital with the lowest energy level first.
TheTwitchdog yes you're right
For calcium, did you skip Potassium because it's not a noble gas?
Can we chance the secvence of emery level
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