One method to predict the molecular shape is the electrolyte pair repulsion theory or the valence shell electron sheell Valance Pair Repulsion (VSEPR). The basis of this theory is the valence electron pairs around the central atom will try as far as possible from each other to minimize repulsion. Valence electron pairs are bonding pairs and lone pairs. Molecules or ions that do not have a lone pair of electrons around atoms freely around the center has 4 basic geometry which depends on the number of bonds on the central atom is linear, flat triangle (trigonal planar), bipiramida triangle (trigonal bipiramid), and octahedral.
Molecular shape is determined by the number of hybrid orbitals.
For example:
- Molecular orbital s then form spherical (ball)
- P orbitals of the molecule forms a ball twist.
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