1. Section 4.1: Naming Binary Compounds
Period 6
Group #5

2. HOW DO YOU NAME THE COMPOUND PCL5?

3. Naming Compounds That Contain a Metal and a Nonmetal
Metals lose electrons to form cations, nonmetals gain electrons to form anions
A binary ionic compounds contains a cation, written first, then an anion
Two types of binary compounds:
Type I: the metal present forms only one type of cation
Type II: the metal present forms two or more cations with different charges

4. What is written first in a binary ionic compound, the cation or the anion?

5. COMPOUND CHART

6. Type 1 Binary Ionic compound
• The cation is named first.
• Simple cations get their names for elements.
• Simple anion’s name has the element’s name with –ide at the end.
• You can write the name of the compound by combining the name of the ions.

7. TYPE I COMPOUND Compounds Ions Name Na,Cl Na+,Cl- Sodium Chloride KI
Potassium iodide
CaS
Ca^2+,S^2-
Calcium Sulfide
CsBr
Cs+,Br-
Cesium Brodide

8. How do you name CaO?
             
-Calcium Oxide

9. Type II binary Ionic Compounds
Metal present can form two (or more) cation with different charges
Most metals can form more than one type of cation
      ex:) Cr ->  Cr2+ or Cr3+
Uses Roman numerals to specify the charge on the cation
-Transition metals are almost always Type II

10. Common Type II Cations Ion (Numbers are exponents) Systematic Name
       Older Name
Fe^3+
iron(III)
ferric
Fe^2+
iron (II)
ferrous
Cu^2+
copper(II)
cupric
Cu+
copper(I)
cuprous
Co^3+
cobalt(III)
cobaltic
Co^2+
cobalt(II)
cobaltous
Sn^4+
tin(IV)
stannic
Sn^2+
tin(II)
stannous
Pb^4+
lead(IV)
plumbic
Pb^2+
lead(II)
plumbous
Hg^2+
mercury(II)
mercuric
Hg2^2+*
mercury(I)
mercurous

11. Which charge does Iron(II) Chloride refer to?
2+ for Iron.

12. What is the Roman numeral for?
-The Roman numerals are used to specify the charge on the cation.

13. Naming Binary Compounds That Contain Only Nonmetals (Type III)
First element in the formula is named first, using the full element name
The second element is named like an anion
Prefixes are used to denote the # of atoms present
The prefix mono- is never used for naming the first element
Drop the final o or a of the prefix when second element is oxygen
Ex: O1  monooxide  monoxide

14. How do you name ICl3?
-Iodine trichloride

15. -Some compounds referred to common names
Ex: water (H2O), Ammonia (NH3)
These names cannot be name in any way.
They can only be memorized.

16. Common Anion Chart

17. Quiz
1. What is the suffix of the ion with the lower charge in the older system of naming?
2. Knowing that N2O5 does not have a common name, how would you name it using the Type III system?
3. What do we call a compound that contains a cation and an anion?
4. What type of metal is specific to Type II system?
5. What is the difference between Type I and Type II compounds?

18. Answers The suffix is –ous. Dinitrogen pentoxide Binary ionic compound
Transition Metals
The metals in Type I has one charge while the metals in Type II can have two more charges.

19. References