1. Ionic Bonding

2. Remember…
Chemical properties, such as reactivity, depend on an element’s electron configuration.
When the highest occupied energy level of an atom is filled with electrons, the atom is stable and not likely to react.
Which group is the most non-reactive group?

3. Electron Dot Diagram (aka Lewis Dot Structure)
Remember, the Lewis Dot Structure deals only with valence electrons.

4. Making Ions
Some elements achieve stable electron configurations through the transfer of electrons between atoms.
This results in atoms that are not neutral anymore.
An atom that has a net positive or negative electric charge is called an ion.

5. Formation of Ions

6. Cation or Anion? An ion that has a negative charge is an anion.
For example: Cl-
An ion that has a positive charge is a cation.
For example: Na+

7. Formation of Ionic Bonds
Opposites attract + & -
This attraction forms a chemical bond.
A chemical bond is the force that holds atoms or ions together as a unit.
An ionic bond is the force that holds cations and anions together.
Ionic bonds form when electrons are transferred from one atom to another.

8. Formation of Ionic Bonds

9. Ionic Bond

10. Ionization Energy
The amount of energy used to remove an electron is called ionization energy.
Ionization energy varies from element to element.
The lower the ionization energy, the easier it is to remove an electron.

11. Trends in Ionization Energy
Ionization energies tend to increase from left to right across a period.
It takes more energy to remove an electron from a nonmetal than a metal in the same period.
Ionization energies tend to decrease from the top of a group to the bottom.
For example: K has lower I.E. than Na so it is easier to remove an electron from K.

12. Ionization Energy
ionization energy

13. Ionic Compounds Compounds can be represented by chemical formulas.
A chemical formula is a notation that shows what elements a compound contains and the ratio of the atoms or ions in the compound.
MgCl2
NaCl
                                                                                      

14. Crystal Lattices Ionic compounds form crystal lattices
Solids whose particles are arranged in fixed positions in a repeating pattern are called crystal lattices.
Compounds are classified into groups based on the shape of their crystals.

16. Properties of Ionic Compounds
The properties of an ionic compound can be explained by the strong attractions among ions within a crystal lattice.
For example, if you hit a large piece of rock salt it will shatter into many smaller crystals.

17. Lolz https://www.youtube.com/watch?v=bK9nMHTLhmk