click the bell icon to get latest videos from ekeeda Hello Friends in the Previous Lecture we have talked about the valence Bond theory as we have also talked about the hybridization and now we are going to talk about Molecular orbital theory so what is molecule orbital theory and what are the postures behind then let’s talk about so friends in the previous section yes we have proved you that you have learned about the molecular theory unless the hybridization concept and now I’m able to talk about the molecular orbital theory so what does this theory means and what are the forces behind this and how it is very much helpful in understanding that how the molecules are formed because of the two atoms or multiple atoms so this is what we are going to talk more so let us find out what are the positive be ended so talking for the first one that is the electrons in the molecule are present in the various molecular orbitals as the electrons of the atoms are present in various atomic orbitals yes this entering orbit is suppose if I’m talking about atomic already and as we know that we can’t fill the electrons from lower energy to higher energy and there’s a reason that even a particular sub shell will have a particular orbit in for example s consists of only one orbital when I talk about P it consists of three orbitals that is px py and PZ similarly we also have an effort slab so I feel the electrons electrons are being filled in the atomic orbitals this is the thing that we are talking about atomic orbitals but we have never heard of molecule already so similarly the molecule orbitals when they have been formed because of the atomic orbitals even they have been filled in that manner where you could see the atomic orbitals clicked on something fin so this is what it represented that is the electron see the molecules are present in the various molecular orbitals as the electrons of the atoms are been present in various atomic orbitals so this is what the first one was and talking about the second point that is the atomic orbitals this is what I am sending it with you that is the atomic orbitals of the comparable energies and the proper symmetry combined to form molecular orbitals so this is the main point that we have on top so talking about the energy obviously we know that the Y field electrons we follow the impossible also and we know that if it does have and that is presenting various orbits and those orbits are also been divided into that is orbitals so if we will say in that matter that the energy of a particular orbital will be comparatively different from that of the other orbitals and that is what the energy level is having a particular value so that is the reason that the orbitals which are probably two particular energy level will have the filling of electrons in such a manner that when two atomic orbitals and they are combining with each other to form a molecule then it is been noted that the two atomic or potentially will have almost the same energy and then only the peak of mine for example if I would same so there are a few examples that we are going to talk in future also but for an example if I am talking about here so helium which has an auto poster that is a shell off that is true s so we know that this two s orbitals we combined with that of the other lithium what other lithium atoms to s and because of they have the similar energy and then only they will combine with each other and then only we could say that the symmetry would be that is sustained and that is how the two atoms they combine with each other has to form a molecule so this is what the second point is and it is indicating about the energy as a less improper symmetry so there are few of us that we are going to talk in the future and then it would be clear very much way that why we are talking about this second point so let us talk about the third point that we have so third words is that an electron in an atomic orbital is influenced by the nucleus but in molecular orbital it is influenced by two or more nuclei depending upon the number of atoms in the molecule so this is what I am so that is for a particular atoms whose the item consists of electrons has less the nucleus so all the electrons that are present in an atom or that are present in various sub shells for Milius orbits so all these electrons are being influenced by the nucleus of a single item human but when I am talking about molecules so obviously a molecule is combination of two or more atoms so what happened is because one of the electron of a particular item morning you will have money and inference with that off it’s odd nucleus but it has it can also have an influence by the other nucleus and that is how we have measured over here that doing in the modular orbitals the electrons are being influenced by two or more nuclei depending upon how much atoms are being combining so as to form a particular molecule so this is what even they will have a influence on it because the two nucleus are more than two degrees even they will have an influence on the electrons of different atoms what they are combining with each other so this is also playing a very vital note then this doesn’t remain the same just like that off the atomic orbital because in when we are talking about an atomic orbital it is only concerned with that of only one item and then cities are only one nucleus will be able to have an influence with that of the all the electrons that are be present in the atom or which are present in different locations on different orbitals in a net but Damon it comes to molecule so even different kind of nucleus or different nucleus will have an influence on each other’s electrons so that is what it was talking about so what I came about the next one that is the fourth one so the fourth part says then the number of volatile operators for me is equals to the combining atomic orbitals yes so suppose if you item a convalescent pose if two atomic orbitals if they are combining with each other so as to form a particular molecule and the two atomic orbitals have two different items or of similar atoms when they are competing with each other so supposing for one atom or one orbital commits with that of the other atoms for an orbiter and then the two molecule orbitals before so this is a very clear indication that the number of molecular orbital that forms it will be equal to the combining atomic orbitals and then only we could say that the number of atomic orbital static participate authentic participation in functional molecule will create the same amount of one glorp it is whenever a molecular orbital a spin form so this is what the fourth point is and let us talk about the another one but before talking about the another point but let me tell you whenever the two atomic orbitals give me for my with each other and according to that they will create the same number of molecular so during this process this is what happens is the two kind of energy levels it is created and that is what is known as a bonding orbital but the other movie spoon exact accounting orbital so now I’m talking about the second point that I was okay about that is when the atomic already combined with each other or which have the comparable energies or chance symmetry so whenever they combine with each other they have a particular energy unit that is the adult god will have particular energy but whenever they combine with each other so as to form the same number of or the total number of atoms that take participation so as to form a molecule orbital so in this case the molecule orbitals that have been formed I’ve been divided into two kind of energy levels that is one of the molecular orbital will be having a new energy one of the molecular building will have higher energy so the one which has basically lower energy is very much influenced in having more symmetry and more stability while talking about the one which has higher energy it is less stable but since the both are also a very helpful information of molecular orbital so this is what we could see in our next lecture also but this is what I’m particularly short clip somebody so let us talk about the next point so the fifth one says that the pointing molecule has lower energy whereas the anti particle molecule has high energy so it is promoted that the molecular brain which has BC the lower energy R is more stable because lesser the energy more is its stability talk about the antibonding molecular orbital is the more the energy the lesson will be its stability so this is what I have talked about earlier also and this – that is anti bonding and bonding orbitals this plays a very vital role in the formation of the molecule because this is not only gave us the idea that how much the energy level decreases or how much the energy level rises but it gives an idea that how the molecule has become more stable when it was not being stable like when it was present in an atomic form so that is the reason that in the future also we are going to talk about this thing and we are will get to know that term why the molecules are busy some of the molecules are missing mostly compared to that their atomic nature so in the future also we are going to study about that how a market is weakly more stable even though more stable than that which is present in its atomic state so that is what we are going to talk about and let us talk about the next one that is this is foot so talking about the sixth point on the six points a is that term just slightly later on probability distribution around a nucleus in an atom is given by the atomic orbital so similarly the electron probability distribution around a group of be clear in a molecule is given by the molecule orbital so atomic array doesn’t gives only the detail about the filling of electrons but it also gives the TPA about the electron probability or you can say like electron distribution around the nucleus and that is what we are talking about for a particular atom but when it comes to the molecule and obviously a molecules is basically made up of more than two atoms and that could be same atoms also that could be different atom Otsu but each of the nucleus of a particular base means all right probably it is miss ordered by the electrons of its own but it can be certain about the nucleus of the other atoms also and on for me to say that it would also be surrounded by the electrons of the other atoms so this is what it says that they get our probability distribution around the group of nuclei or the developers only we have got to know in our previous lecture also then whenever other two items they combine with each other obviously the nucleus have an influence on the other main place also so that is why I want to explain that the electrons have or the electron distribution that I was talking about so when it comes to a molecule so that is being given by the molecule on it so it is a similar to that what we talked about the atomic orbitals so similarly we are talking about the molecule molecular orbital but the differences in atomic orbitals we are talking about Adam well talking about the molecules we are talking about the molecules or the atoms that are recombining so as to form a molecule so this is false the sixth point s and the both are almost the same but the idea which is missing and the dollar is talking about the next one that is it is the same point so the seven points is that the molecule orbitals obey the following rules as to the atomic orbitals so the atomic orbital as if it follows the rule so similarly the molecular orbitals have also are following the same rule and that is what we have we have observing the six point of this theory that is not only for little distribution but also for that’s what we have solved that whenever the two adam suppose if two enemy goddess they are combining so obviously two more evidence would before so that is what we have learn in their previous points and let us talk about another thing that I am going to talk about that is the electron filling is accordance with the impossible super it obeys the polish exlusive principle and hurts to love makes women disability so similarly when we are talking about that is filling the atomic orbitals or like filling the electrons in the valence shells so we always consider that we should fill the promise in mediation depending upon the energy and that is what we are talking about the impossible singing and we have got to know also that how can we represent the electronic on fiction of a particular atom and that also we are filling it with the according to that off for the air possible like that of MC like first we’ll fill it with 1s then 2’s then 2p then 3s then 3p then in spite of filling it in 3d we fill it first with 4s then we move on to 3d so it depends on the energy lumen and that is what the Abbas principle is so while filling the electrons in the atomic orbitals so because here the same thing so but in talking about in molecular orbitals even though in molecular orbitals we open the same route of the almost principle and in order to do that only we fill the electrons depending upon the energy level or depending upon the possible that we have got to know so that is what we can do in our future lecture so that is the molecular orbital diagrams of various molecules so this is also playing a very vital role in understanding this whole molecule in theory and that is very much helpful in understanding that how the molecules are being formed because of the end of the confidence so now let us talk about the next one that is the obey polish excuse it is in video that to be that promise of the same atom cannot have all the same quantum numbers or set of quantum numbers so similarly when it comes to the molecular orbital also so even the quality of evidence they obey the Pauli exclusion principle and the two electrons of the molecule will not have the all these same set of quantum numbers and that is what the Pauline exquisite peaceful is and talking put the bait yes this is the also the main thing that I am going to talk about and that is her true love maximum anticipate yes my flute electrons that is I’m talking about the hunt you suppose if I am talking about the p orbital so suppose if three reckon already sir suppose if three vacant orbitals are be present that is px py and PZ and we have basically three electrons were stupid so we don’t fill in the two electrons in the P X first and then we fill it one electron in the P 1 so that is not the correct might have to silly and that is what the hunts who needs not be domain but suppose if we have three electrons and we have three and P that is P orbitals that speaks we had PZ and we’ll show be the Hutt’s rule and that is we have to fulfill the electron in such a way that each of the already occupied at least one electron and then the filling will start and or then the bearing will start so that’s the reason that the px will have one electron the py will have what is it on and the PZ will also have fun you know so that is what the rule is what we have studied during the filling of electrons in the atomic orbitals but when you are talking about the Monica or even the molecule orbital should have to follow the same rule that is even though it is a possible or you can do when you are talking about the Polly’s exclusive consumer or mainly and it’s her true love or maximum anticipation so this is playing a vital role if this odd principles are basically are abated during the formation of a molecule into thinking that is what we’re talking about so this all should be obeyed and we should concern with that so this is what I was talking about that is everything so thank in France for watching this video I hope you have understood this video very clearly and you have got to clear your biggest concept behind this and I hope you have understood this video I didn’t share this with your friends and yes systemic it thank you you