H20

H20

1. ELECTRONIC GEOMETRY

   • There are four electron pairs arranged in a tetrahedral shape. Water has 8 electrons around the central oxygen atom.

2. MOLECULAR GEOMETRY

   • Bent molecular geometry. The 2 lone electron pairs exerts stronger repulsion on the two bonding pairs of electrons between hydrogen atoms to create a slight compression to a 104.5 degree bond angle.

3. POLARITY

   • A water molecule, because of its bent shape, is a polar molecule. That is, it has one side that is positively charged and one side that is negatively charged, due to differences in electronegativity between hydrogen and oxygen atoms.

4. HOW THE PRESENCE OF LONE PAIR AFFECT THE GEOMETRY

   • There are two pairs of lone pair electrons in water , lone pair of electrons is pushing the two bonding pairs down, causing them to be closer together than if there were no lone pairs. This angular – or bent – arrangement of the bonds gives the molecule its shape.