The document provides information on naming binary ionic compounds and writing their chemical formulas. It also discusses naming and writing formulas for ternary ionic compounds and molecular compounds. Key points include using cation and anion names and charges to determine formulas for ionic compounds, and using prefixes to indicate the number of atoms in molecular compounds when writing their names.

1. Naming Binary Ionic Compounds Write the names of the following KCl Na 3 N CrN Sr 3 P 2 PbO PbO 2 Na 2 Se Potassium chloride Sodium nitride Chromium (III) nitride Strontium phosphide Lead (II) oxide / Plumbous oxide Lead (IV) oxide / Plumbic oxide Sodium Selenate

2. Ternary Ionic Compounds Will have polyatomic ions At least three elements name the ions NaNO 3 CaSO 4 CuSO 3 (NH 4 ) 2 O

3. Ternary Ionic Compounds LiCN Fe(OH) 3 (NH 4 ) 2 CO 3 NiPO 4

4. Writing Formulas The charges have to add up to zero. Get charges on pieces. Cations from name of table. Anions from table or polyatomic. Balance the charges by adding subscripts. Put polyatomics in parenthesis.

5. Writing Formulas Write the formula for calcium chloride. Calcium is Ca +2 Chloride is Cl -1 Ca +2 Cl -1 would have a +1 charge. Need another Cl -1 Ca +2 Cl 2 -1

6. Write the formulas for these Lithium sulfide tin (II) oxide tin (IV) oxide Magnesium fluoride Copper (II) sulfate Iron (III) phosphide gallium nitrate Iron (III) sulfide

7. Write the formulas for these Ammonium chloride ammonium sulfide barium nitrate

8. Things to look for If cations have ( ), the number is their charge. If anions end in -ide they are probably off the periodic table (Monoatomic) If anion ends in -ate or -ite it is polyatomic

9. Molecular Compounds Writing names and Formulas

10. Molecular compounds A compound made of only nonmetals smallest piece is a molecule can’t be held together because of opposite charges. can’t use charges to figure out how many of each atom

11. Naming Molecular Compounds is Easier Ionic compounds use charges to determine how many of each. You must figure out charges. You must figure out numbers. In Molecular compounds the name tells you the number of atoms. Uses prefixes to tell you the number

12. Prefixes 1 = mono- 2 = di- 3 = tri- 4 = tetra- 5 = penta- 6 = hexa- 7 = hepta- 8 = octa- 9 = nona 10 = deca To write the name - write two words

13. Prefixes One exception is we don’t write mono- if there is only one of the first element. No double vowels when writing names (oa oo) Prefix Name Prefix Name -ide To write the name write two words

14. Name These N 2 O NO 2 Cl 2 O 7 CBr 4 CO 2 BaCl 2 Di nitrogen monoxide Nitrogen di oxide Di chlorine hept oxide Carbon tetra bromide Carbon di oxide Barium di chloride

15. Write formulas for these diphosphorus pentoxide tetraiodide nonoxide sulfur hexaflouride nitrogen trioxide Carbon tetrahydride phosphorus trifluoride aluminum chloride I 4 O 9 SF 6 NO 3 CH 4 PF 3 P 2 O 5 AlCl 3 *Gotcha*