Probably too late for this answer but here it is anyway. The outer shell he is referring to is the M-shell bcos the 17th electron is occupied in the 3p orbital(which is part of the M-shell) if you follow Hund's rule. 1s2, 2s2, 2p6,3s2, 3p5 = 2+2+6+2+5=17. So, Chlorine is more than half filled and thus attracts electron. It needs only one more electron to complete the 3p orbital and thus the "outer shell". It has this tendency bcos it reduces the overall energy of the atom, but you don't need to know this as it requires QM treatment. Anyway, that is your answer, hope it helps. If it doesn't and you are still sceptical then reading a bit about the QM treatment of Hydrogen atoms and subsequently about the quantum numbers n,l,m_l and m_s should help you bridge the gap between Physics and Chemistry, at least on the atomic scale. If you can differentiate between shells and orbitals then that would also help you answer this question but then again, the fundamentals lie in the quantum numbers.
note, for me:
the electrons circle around the nucleus which is why electrons in covalent bonds move around freely in both atoms
2:26 one electron to fill its outer shell ?? but 3rd ring maximum capacity is 18, right ? So what do u mean by to fill it’s outer shell ?
Probably too late for this answer but here it is anyway. The outer shell he is referring to is the M-shell bcos the 17th electron is occupied in the 3p orbital(which is part of the M-shell) if you follow Hund's rule. 1s2, 2s2, 2p6,3s2, 3p5 = 2+2+6+2+5=17. So, Chlorine is more than half filled and thus attracts electron. It needs only one more electron to complete the 3p orbital and thus the "outer shell". It has this tendency bcos it reduces the overall energy of the atom, but you don't need to know this as it requires QM treatment. Anyway, that is your answer, hope it helps. If it doesn't and you are still sceptical then reading a bit about the QM treatment of Hydrogen atoms and subsequently about the quantum numbers n,l,m_l and m_s should help you bridge the gap between Physics and Chemistry, at least on the atomic scale. If you can differentiate between shells and orbitals then that would also help you answer this question but then again, the fundamentals lie in the quantum numbers.
@@user-gu3gm5de7v nice
Splendid
Thank you for video. It's easiest to understand.
Honestly, where were these video all my life? This is the easiest i've ever understood this; (this my 4th go around on biology lol)
Nice info 👍
Which bond has a greater bond energy Ionic or covalent
Covalent
Thank you so much for video! It deserves a much more subscribers .