1. DID YOU KNOW!
Close to 70% of Canadians need a dose of coffee to start their day, and it has now been confirmed that the popular stimulant is highly addictive.
Many coffee drinkers experience headaches and even symptoms similar to flu – nausea, muscle aches and pains – when they abstain from their fix.

2. NOMENCLATURE
NAMING COMPOUNDS
(p48-50)
466

3. Metal & Non-Metal This is an ionic bond.
Steps to follow in naming compounds:
1) Name the metallic element first.
2) Then name the second element.
3) Add the ending “ide” to the second element.

4. Examples MgH2 Magnesium hydride NaCl Sodium chloride
Li2S Lithium sulfide
K2O Potassium oxide
Notice how the little numbers(subscripts) do not affect the way we name the compounds.

5. Non-Metal & Non-Metal This is a covalent bond.
Steps to follow when naming these compounds.
1) Name the more metallic element first.
2) Name the second element with “ide” as the ending.
3) Use prefixes before each element.

6. PREFIXES

7. Examples N2O5 dinitrogen pentoxide PCl3 phosphorus trichloride
CO carbon monoxide
Note that we drop the prefix mono if it appears on the first element.

8. Practice Questions Give the name of the following compounds: KI Ca3P2
K3O
CCl4
N2O3
SCl3

9. ANSWERS KI Potassium iodide Ca3P2 Calcium phosphide
K3O Potassium oxide
CCl4 Carbon tetrachloride
N2O3 Dinitrogen trioxide
SCl3 Sulfur trichloride

10. Transition Elements
The transition elements are chemically quite different from the metals in the “A” block, due to differences in electronic configuration.
For example, Fe can loose two or three electrons to become Fe2+ and Fe3+, respectively.

11. To identify the charge of Fe in a compound the following nomenclature is used.
Fe2+ is iron(II)
Fe3+ is iron (III)
So iron(III) chloride is FeCl3
Cu1+ is copper(I)
Cu2+ is copper(II)

12. More examples with Transition Metals
CuCl2 =
copper(II) chloride
ZnCl2 =
zinc (ll) chloride
CoBr2 =
cobalt(II) bromide
Hg2S =
mercury(I) sulfide

13. Practice Questions IF5 BaCl (WRONG!!)
Give the formula for each compound:
1) iodine pentafluoride (covalent)
IF5
2) Barium chloride (ionic)
BaCl (WRONG!!)
Ba2Cl1 --> BaCl2 (use crossover)
(be careful when dealing with ionic compounds, you must use the crossover rule)