1. Chapter 1 Section 2
IONIC BONDS

2. Background
Atoms will bond in order to complete their outer energy levels-BE HAPPY! One way atoms do this is by the transfer of electrons from one atom to another This occurs between a METAL and a NONMETAL

3. Definitions
Chemical Bonding – atoms join together to create a different compound
Ionic Bonding – bonding that involves the transfer of electrons (metal with nonmetal)
(It’s a win-win situation. One atom gives off electrons so that its lower shell is full. The other atom receives electrons so that it can fill its outer shell)

4. Ions - Isn't it ionic?
When atoms transfer electrons, the charge of the atom is changed.
A charged atom is called an ION.
(hence an “ionic bond”)
If an atom gains electrons, it becomes negatively charged. Called Anions (ide)
If an atom loses electrons, it becomes positively charged. Called Cations (ion)

5. Is it an Ion?
To determine a particles charge, you must compare the number of PROTONS with the number of ELECTRONS. Use the diagram to answer the problems on your worksheet

6. Ca Li O F K Al Ar IOns Element Metal or non # valence e-
Give(+) or Get (-)
Ion Symbol Ca Li O F K Al Ar

7. Sodium Chloride
Show Chem video demo-backyard chemistry