1. IONIC COMPOUNDS

2. Ionic Chart Formed from metallic and non- metallic elements Forms ions in solution Conducts electricity Solid at room temperature

3. When at atom gains or loses electrons, the atom is no longer neutral. it has become an ion. An ion is a particle or group of particles with a positive or negative charge.

4. A sodium atom contains 11 protons and 11 electrons. If sodium loses an electron, it has 11 protons but only 10 electrons, so the sodium ion is positive. The chlorine has gained an electron leaving it with a slight positive charge. The two elements now form a compound- sodium chloride (NaCl) or table salt!

6. Conductivity is the ability of a substance to carry an electrical current. Charged particles (positive or negative) can carry an electrical current through water.

7. How do we name ionic compounds? 1. Name includes both elements in the compound, with the name of the metallic element first. 2. Non-metallic element is 2 nd. Its ending is changed to “-ide” 3. Subscripts indicate the ratio of ions in the compound. ◦ Ex: CaCl 2  Ratio is 1:2

8. Name these ionic compounds below: 1. NaCl 2. NaF 3. LiCl 4. ZnS

9. Where is the ionic charge of an element? Small positive or negative numbers Top right-hand corner, under the atomic mass. GROUP #IONIC CHARGE 11+ 22+ 171- 162- 153-

10. REMEMBER!! When you are writing the chemical formulas for IONIC COMPOUNDS, You need to switch charges and write them as the subscript!! EXAMPLE: magnesium chloride

11. Let’s try these: 1. magnesium oxide 2. lithium chloride 3. calcium chloride 4. sodium sulfide

12. To Do: Ionic Compound Worksheet Molecular/ Ionic Compound Worksheet