Long Answer TypeDefine moleuclar orbital. What are the salient features of Molecular orbital theory?
Short Answer TypeLong Answer TypeWhat is a linear combination of atomic orbitals (LCAO) far obtaining molecular orbitals ?
Write the important conditions required for the linear combination of atomic orbitals to form molecular orbitals.
Short Answer TypeWrite the significance of a plus and minus sign shown in representing the orbitals.
The orbital is the maximum probability of finding an electron around the nucleus. This probability is measured in terms of the wave function. The wave function can be positive or negative values.
Since orbitals are represented by wave functions, therefore a plus sign in an orbital represents a positive wave function and a minus sign represents a negative wave function. Further the wave functions of two 1s atomic orbitals can combine in two different ways:
(i) When both have the same signs.
(ii) When they have different signs.
Assuming Z-axis as molecular (or internuclear) axis, label the molecular orbtials formed by the following combinations of atomic orbitals: (i) 1 s + 1 s (ii) 2py – 2pv (iii) 2Pz – 2pz.
Long Answer TypeDiscuss the shapes of molecular orbitals formed by the combination of the following atomic orbitals. (lateral overlap)
(i)2px + 2py (ii) 2pz – 2pz
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