00:00Okay, very important topic is Valence Beyond Theory.
00:05The two scientists are Hitler and London in 1927.
00:09Hold on, that's why Hitler had hitler to hitler.
00:13Covalent bond is formed by overlap fusion of valence atomic orbital.
00:19Here we discuss the valence.
00:21Valence shell is called outermost shell,
00:23their atomic orbitals.
00:26Stability of band depends on extent of overlapping.
00:30The greater the overlapping of atomic orbital result in stronger bond.
00:35Bilkul ji, bhoat acha point hai.
00:37Jithni zhada overlapping strong hooghi, atomic orbital utana strong hooga.
00:43Only valence electron of nearly identical energies are involved in bonding.
00:47Chalam.
00:48Chalam.
00:49Woh electrons, valence electron bonding me involve hoot hai.
00:53Jhin ki energy near ho.
00:55Or atom cannot come closer than bond length of molecule.
01:01Atom bond length se kariib nahi hai.
01:04Ye toh baat hoogai valence bond theory ke.
01:06Doussere bade hem theory hai.
01:08Molecular orbital theory.
01:10Dene walee 3 science ninten hunt.
01:12Haqqal mullik hai.
01:141930 mein aai te.
01:16Covalent bond is formed by overlap fusion of all atomic orbital.
01:20Doe kuhu fark hai.
01:24Valence bond theory me sir.
01:25Valence bond ki baat ho rhi hai.
01:28Phir molecular orbital can be obtained by method of linear combination of atomic orbital.
01:35Or united atomic method.
01:37Aapke lehasse wa point important nahi hai.
01:40Phir ekor bade hi haem baat haap.
01:42Ye bade important hai.
01:43Paper ke saaf so.
01:45Fusion of atomic orbital result in two kind of molecular orbital.
01:51Orbital with high electron density in region between two nuclei.
01:55With lower energy but greater stability called bonding molecular orbital.
02:02Yianni energy with high electron density in region between two nuclei.
02:07Jis mein kiya.
02:07Dekho ek baat sa na.
02:08High electron density yianni kam jaga mein zahat electron.
02:12Tho jab bhi aisa hooga.
02:14Tho energy kiya hoogai low.
02:15Or yad rukkho jab bhi lower energy hoogai stability kiya hoogai greater.
02:19Ye kailahate hyn bonding molecular orbital.
02:22Jis mein low electron density yagi low electron density yagi.
02:28Low electron density yagi ohogai.
02:29Yaya hoogai lower stability yagi.
02:32Yay kailahate ay anti-molecular bonding.
02:35Anggi molecular orbital.
02:36Yikor kailahate ay fractional bond are possible according to this theory.
02:41Yes.
02:41See,
