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Describe LCAO method for the formation molecular orbitals of Hydrogen. Write the energy level diagram for these orbitals. |
Answer» Solution :The FORMATION of boding molecular orbital when two atomic orbtials of hydrogen atosm (1s orbital) combine the addition of their wire functions is shown below.  The atomic orbitals of these atoms may be represented by the wave function `Phi_(A), Phi_(B)` mathematically, the formation of molecular orbitals may de described by the linear combination of atomic orbitals that can TAKE place by addition and by substraction of wave functions of INDIVIDUAL atomic orbitals as shown below. `Phi_(mo)=Phi_(A)+-Phi_(B)` Therefore the two molecular orbitals `sigma` and are `sigma.` formed as `sigma=Phi_(A)=Phi_(B)` `sigma.=Phi_(A)=Phi_(B)` The Mo `sigma` formed by the addition of atomic orbitals is called the bonding molecular orbital while the molecular orbital `sigma.` formed by the substractioof atomic orbital is KNOWN as antibonding molecular orbitals. 
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