Valence Bond (VB) Theory
Main Postulates - I) The metal ligand bond arises by donation of pair of electrons by ligands to the central metal atom. II) To accommodate these electrons the metal ion must possess requisite number of vacant orbitals of equal energy. These orbitals of the metal atom undergo hybridisation to give ..
How to name ions with two different electropositive valency?
The suffix ' ous ' is attached at the end of the name of the metal with lower valency. Suffix ' ic ' is attached at the end of the metal with higher valency..
Valence Shell Electron Pair Repulsion (VSEPR) Theory
The VSEPR theory, proposed by R.J.Gillespie and R.S. Nyholmm in 1957, is based on the repulsions between the electron-pairs in the valence-shell of the atoms in the molecule. It was developed to predict the shapes of the molecules in which the atoms are bonded together with single bonds o..
Example:1
Determine the valency of chlorine (Cl - 1..
Example 1:
Calculate number of valence electrons, the valency and valence shell of an atom whose atomic number is ..
Example
0 - 8 : 2, 6 Valency = 8 - Number of valence electrons = 8 - 6 = 2 Let us test our understanding of valency and valence electrons before we proceed ahea..
Variation down the group
On moving down the group the number of valence electrons remain the same and therefore all the elements in the group exhibit the same valency..
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