jokes Q What is the show cesium and

jokes • Q: What is the show cesium and iodine love watching together? • A: CSI • Q: Anyone know any jokes about sodium? • A: Na • Q: Did you hear how the date with oxygen and potassium went? • A: It went OK

Ions C. 3 -S. C. 1 -I will be able to find the charge/oxidation number for multiple elements.

What is an Ion? • An Ion is a charged atom. • Every element on the periodic table wants to have a full outer shell.

How can an Atom Become Charged? • THE ONLY WAY AN ATOM CAN BECOME CHARGED IS IF IT GAINS OR LOSES ELECTRONS!! • Remember Protons and Neutron are found tightly packed in the nucleus. • Also if you change the number of protons an atom has you completely change the element itself.

Metals • They are found on the left side of the periodic table therefore they need to lose electrons to become stable • Positive Ions are called cations

Non-Metals • Non-metals are found on the right side of the periodic table therefore they need to gain electrons to become stable. • Negative ions are called anions

Finding the charge • Find the charge for the following Ions Na Cl Al Ne

Ionic Compounds C. 3 -S. C. 3 -I can draw Lewis diagrams to show ionic bonding

Ionic Compounds • Bonds which occur between a metal and a non-metal. Opposites Attract!!!

Drawing ionic compounds • We can use Lewis diagrams to show ionic bonds form. The objective is to balance the number of electrons the metal gives up with the number of electrons the non-metal gains. • Ex. Sodium and chlorine • Ex. Magnesium and nitrogen

Naming and Finding the formula for ionic compounds. C. 2 -S. C. 2 -I will be able to name and find the formula for ionic compounds.

Review: Drawing ionic compounds • lithium and oxygen Formula It is much easier to find the formula for ionic compounds. Lets check it out….

Writing the Formula for an Ionic Compound • 5 step rule 1. Write the symbol of the metal and its charge. 2. Write the symbol of the non-metal and its charge. 3. Criss-cross the ionic charges 4. Remove all the “+” and “” charges, as well as the 1’s. 5. Reduce if possible • Ex. lithium and oxygen

Lets try a couple… • 1. Barium and Fluorine • 2. Aluminum and Phosphorus • 3. Sodium and Arsenic

Naming Ionic Compounds • 3 step rule • Ex. Li. Cl 1. Write the full name of the metal first 2. Write the prefix of the non-metal. 3. Add the ending “ide”

Lets try a couple… • 1. Al 2 O 3 • 2. Ba. S • 3. K 2 O • 4. Ca 2 C

Bonding with classmates…