Slides in this set
What determines molecular shape?
· Electron pairs around the central atom.
· Lone pairs of electrons are electrons that are not
· Bonding pairs of electrons are electrons that are
shared with another atom in a covalent bond.
· Electron pairs repel each other.
· The molecular shape results from the electron
pairs arranging themselves to be are as far apart
from each other as possible. They minimise
mutual repulsion…read more
What is the electron-pair repulsion
· Electron pairs repel each other because all
electrons are negatively charged.
· Lone pairs repel more than bonding pairs.
· Each lone pair reduces the bond angles by 2.5
What are `bent'/non-linear molecules?
· Molecules with two bonding pairs of electrons
and one or more lone pairs of electrons.
· Bond angle = bond angle for number of
electron pairs on the central atom 2.5
degrees for every lone pair.
· E.g. SO2 and H2O…read more