Categories
Chemistry History

Today in Chemistry History – Linus Pauling and Electronegativity

Today, February 28, marks the birthday of Linus Pauling. For chemists Pauling likely needs no introduction; he’s famed for his work on the nature of chemical bonds and also on the structures of biological molecules. Here we take a brief look at one aspect of his work to which he lent his name: the Pauling electronegativity […]

Categories
General Chemistry

VSEPR & Shapes of Molecules

One for the chemistry students (and teachers!) out there today, with a look at how we can work out the shapes of some simple molecules using Valence Shell Electron Pair Repulsion (VSEPR) theory. These shapes are decided by the arrangement of electrons around the central atom in the molecule.