The lone pair creates repulsion between the molecules attached to it and distorts the shape.
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A lone pair of electrons takes up space despite being very small. Lone pairs have a greater repulsive effect than bonding pairs. This is because there are already other forces needing to be taken into consideration with bond pairs. So to summarize: Lone pair-lone pair repulsion > lone pair-bond pair repulsion > bond pair-bond pair repulsion. This makes the molecular geometry different.
The lone pair pushes bonding electron pairs away.
Tetrahedral bond angle of a molecule which have a lone pair electron is 107, smaller than regular 109.5, due to the repulsion of electrons of lone pair.
they are the same. Lone pair is unshared pair of electrons and bond pair is shared pair of electron.
That would be Trigonal Pyramidal in shape and have an sp3 hybridization.