The first simple theory that was put forward to explain the shape of the molecule is known as Valence Shell Electron Pair Repulsion Theory. This theory was given by Sidgwick and Powell in 1940. 1) The central atom is linked to other atoms by covalent bonds which are formed by sharing of electrons. 2) The central atom is surrounded by a shared pair of electrons and … [Read more...] about Valence Shell Electron Pair Repulsion Theory