The σ* molecular orbital has zero nodes, contributes to bonding, and has nonzero electron density directly along the internuclear axis.
The σ* molecular orbital is a type of bonding molecular orbital that has zero nodes, meaning that there are no regions of zero electron density along the internuclear axis. It is also a bonding orbital, meaning that it contributes to the formation of the chemical bond between the two atoms. The σ* molecular orbital also has nonzero electron density along the internuclear axis, meaning that it is localized directly between the two nuclei. This contributes to the stability of the bond, as the electron density allows for the sharing of electrons between the two atoms.
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