1. 4.1 Naming Binary Compounds
Period 5
Group 5

2. Naming Compounds that Contain Metals & Nonmetals
Metals lose one or more electrons to become a cation
Nonmetals gain one or more electrons to become an anion
Resulting substance is called a binary ionic compound (BIC)
BIC’s contain cations and anions. Cations come first
Type I- Na+, Cs+, Ca2+, Al3+
Type II- Forms two or more cations

3. How many types of binary ionic compounds are there?
There are 3 types of binary ionic compounds; Type I, Type II, and Type III.

4. Type I Cations are always named first, anions second
Anions take the root and adds –ide
Formulas- ions are represented by the element symbol Cl. Cl means Cl-, Na means Na+
Individual ions- charge is always included

5. Type I Example: Compound Ions Present Name NaS Compound Ions Present
Sodium fluoride

6. Type II Many metals form more than one type of cation
We use roman numerals to specify the cation charge
To determine the charge, we balance them out
Roman numerals tell the charge on the ion, not the number of ions present

7. Type II Example: Compound Ions Present Name FeO Compound Ions Present
iron (II) oxide

8. Type III Type III only contains nonmetals
The first element in the formula is named first, and the full element name is used
The second name is named as if it were an anion (-ide)
Prefixes are used to figure out the number of atoms present
Prefix mono- is never used for the first element

9. Type III Example: Compound Ions Present Name B4N2 Compound
Pb2+, S2-
pentaboron dinitride

10. Review
Type I- ionic compound with metals that always form a cation with the same charge
Type II- ionic compounds with metals (transition metals) that form cations with various charges
Type III- compounds with only nonmetals

11. Review Example: Type II PbCl2 PbCl2 Pb2+, Cl- Compound Ions Present
Name
PbCl2
Compound
Ions Present
Name
PbCl2
Pb2+, Cl-
lead (II) chloride

12. Quiz What happens to the metals and nonmetals? 2. Type I 3. Type II
Compound
Ions Present
Name HF
Compound
Ions Present
Name
PbS

13. Quiz Type III 5. Type I Compound Ions Present Name N2O3 Compound
MgBr

14. Answer Key
The metals lose ions to become a cation and the nonmetals gain ions to become an anion. 2. 3.
Compound
Ions Present
Name HF
H+, F-
hydrogen fluoride
Compound
Ions Present
Name
PbS
Pb2+, S2-
lead (II) sulfide

15. Answer Key 4. 5. Compound Ions Present Name N2O3 N3-, O2-
dinitrogen oxide
Compound
Ions Present
Name
MgBr
Mg2+, Br -
magnesium bromide

16. References