1. Notes #4: Stock System Naming (Ionic Bonds)
WNHS Chemistry
***You need your Periodic Table***

2. USING THE STOCK SYSTEM
Today we will be naming and writing formulas for compounds involving the transition metals (d-block)
Quiz tomorrow will be on this!

4. WHY HAVE WE AVOIDED THESE THUS FAR?
Transition metals can have more than one stable charge****
Example: CoCl3 vs. CoCl2
Example: Fe2O3 vs. FeS
Use the stock system to tell which ion is in the compound!

5. I II III IV V VI VII VIII STOCK SYSTEM NAMING
Roman numerals show the CHARGE of the metal ion (NOT the number of atoms!!!)
I II III IV V VI VII VIII
Transition Metal Charge Anion Metal Name Name

6. MBr4 M(CO3)3 M2(SO4)3 M3(PO4)2 “Metal” (IV) Bromide
Remember: This is the CHARGE of ONE atom
WHAT’S MY CHARGE
MBr4
M(CO3)3
M2(SO4)3
M3(PO4)2
“Metal” (IV) Bromide
“Metal” (VI) Carbonate
“Metal” (III) Sulfate
“Metal” (II) Phosphate

7. BE ABLE TO GO BACKWARDS! :)
Ti(NO3)4
Titanium (IV) Nitrate
Manganese (IV) Sulfite
Iron (II) Nitride
Mn(SO3)2
Fe3N2

8. RULES TO REMEMBER Use this system ONLY for transition metals (d-block)
Metals are always POSITIVE (left side of the PT)
If you know the negative, you can assign a positive
Roman Numerals show the CHARGE of the ion (not the # of atoms)
FORMAT → Metal Name (Metal Charge) Anion Name