Question

valence shell electron pair repulsion theory

Answer 1

1,shape of molecules is determined by shared pair of electrons that mean lone pair and bond pair present in valence shell of central atom

2,lone pair of electrons occupy more space than bond pair of electrons

Answer 2

Valence shell electron repulsion theory is a model used in chemistry to predict the geometric of individual molecular from the number of electron pairs surrounding their central atoms . It is also named as the Gillespie-Nyhlom theory after its two main developers ,Ronald Gillespie and Ronald  Gillespie