Notes Ionic Bonding Ionic bond – *between a metal and a nonmetal  Bonding caused by the transfer of electrons from metals to nonmetals  This causes the formation of ions (charged particles)  Positive and negative ions are attracted to one another (opposites attract)

Cations – metals, positive ions Anions – nonmetals, negative ions

Anion Names Carbide Nitride Oxide Fluoride Phosphide Sulfide Chloride Bromide Iodide Selenide

Ionic Bonding with Lewis Dots Steps 1.

Draw Lewis Dots

2. Show electron movement from metals to nonmetals until cations lose valence electrons and anions have “eight is great”

3. Write formula with metal first, include ratio of each ion as subscripts 4. Write name, metal first, add suffix –ide to anion Sodium & oxygen

Sodium oxide

Ionic Bonding with Oxidation Numbers

Goal – Compounds need a zero charge Step 1 – write ions with charges as a superscript Step 2 – add more ions until sum of charges equal zero

Example: rubidium + Rb1+

sulfur

S2-

Rb1+ Rb2S rubidium sulfide