1. Names and Chemical Formulas of Ionic Compounds
3.2 All about ionic compounds !

2. Review of ionic compounds:
They are between metals and non-metals
They are between metals and polyatomic ions!
They gain and lose electrons ( a transfer)
Ex: calcium bromide
Today we will learn how to write the names and formulas of ionic compounds 

3. Rules for writing names of ionic compounds

4. Rules:
The (metal) positive ion is always the first part of the name and its name does NOT change.
Calcium Calcium
The (non-metal) negative ion is always the second part of the name and its name changes.
The non-metal ‘s name changes to the suffix/ending “ide”
Bromine  Bromide
If the non-metal is a polyatomic ion, then write its original name with no changes at all
e.g. Ca(NO3)2 calcium nitrate

5. Practice naming NON-METAL IONS
Take off the original ending and add an “ide” ending.
Element Name Ion Name
Florine (F) 
  Sulphur (S) 
Write the names of the following ions:
a) Br- = __________________________
b) Cl- = __________________________
c) I- = __________________________
d) O-2 = __________________________
e) N-3 = __________________________

6. Write the names for the following ionic compounds:
NaCl LiNO3 CaBr2 Ba3(PO4)2 MgO KOH

7. Rules continued
How to write the CHEMICAL FORMULA for the ionic compound???? We need to use the charges/combining capacity for each ion when we do this. So how does it work?

8. How to write chemical formulas of ionic compounds
Aluminum Chloride Potassium Nitride

9. How to write chemical formulas of ionic compounds
Sodium phosphate Magnesium oxide

10. How to write chemical formulas of ionic compounds
Iron(III) oxide

11. NAMING MONATOMIC METAL IONS
If a metal has more than one possible charge, the charge has to be indicated by a Roman numeral, in parenthesis, immediately following the name. Ex: Fe+3 Fe+2 Roman numerals are: I 1 V 5 IX 9 II 2 VI 6 X 10 III 3 VII 7 IV 4 VIII 8

12. P. 86

13. P. 87

14. Back to multivalent metals
What is the name for
Fe2O MnO Hg3N2

15. p. 89

16. p. 90

17. Practice naming with polyatomic ions
Potassium chromate
CaSO4

18. p. 91

19. Homework
Homework is to finish all the questions given in this set of notes.
You should be feeling a little Y Zr (wiser) after this lecture.
Credit to Alexander the great and his gang