Ionic bonding

Learning goals We are learning why and how ionic bonds form. We are learning to draw ionic bonding using Lewis diagrams. We are learning to name ionic compounds.

Ionic Bonds Attraction between positive and negative ions Large number of ions join together. Always have a net charge of zero.

Ionic bonds Involves a transferring of electrons: Metals lose electron(s) to gain a full octet. Non-Metals gain electron(s) to gain a full octet. The ions are then held together electrostatically. Law of electric charges: Like charges repel Unlike charges attract

Properties of ionic bonds Due to strong bonds: Hard Brittle High melting points Some are soluble in water Dissolved ionic compounds conduct electricity and are called electrolytes

Binary compounds Involve only two types of atoms One metal and one non-metal Naming Name the cation first and anion second with an ‘ide’ ending sodium chloride lithium sulfide

Example #1 a) Ca and O b) Na and H c) Li and S For each metal / non-metal pair below Draw the Lewis dot diagram for the resulting compound Write the chemical formula Name the compound produced a) Ca and O b) Na and H c) Li and S

With your elbow partner On a whiteboard, complete the following: K and O Al and S Ba and N

Complete on your own Lewis diagrams showing the bonding of: magnesium and chlorine lithium and oxygen potassium and fluorine

Learning goals We are learning why and how ionic bonds form. We are learning to draw ionic bonding using Lewis diagrams. We are learning to name ionic compounds.

Please complete P195 #1, 2, 7, 9