Introductory Chemistry: A Foundation - Zumdahl S.S., DeCoste D.J. 2019

Nomenclature
Naming Binary Compounds: A Review

Objective

· To review the naming of Type I, Type II, and Type III binary compounds.

Because different rules apply for naming various types of binary compounds, we will now consider an overall strategy to use for these compounds. We have considered three types of binary compounds, and naming each of them requires different procedures.

Type I: Ionic compounds with metals that always form a cation with the same charge

Type II: Ionic compounds with metals (usually transition metals) that form cations with various charges

Type III: Compounds that contain only nonmetals

In trying to determine which type of compound you are naming, use the periodic table to help identify metals and nonmetals and to determine which elements are transition metals.

The flowchart given in Fig. 5.1 should help you as you name binary compounds of the various types.

Figure 5.1.A flowchart shows how binary compounds are named. If there is no metal present, then it is Type 3: use prefixes. If metal is present, then if the metal does not form more than one cation, then it is Type 1: Use the element name for the cation. If it does form more than one cation, then it is Type 2: determine the cation charge and use a Roman numeral after the element name for the cation.

A flowchart for naming binary compounds.

Interactive Example 5.6. Naming Binary Compounds: Summary

Name the following binary compounds.

a.

b.

c.

d.

e.

f.

g.

Solution

a. A flowchart shows how CuO is named. If metal is present, then if it does form more than one cation, (copper is a transition metal), then it is Type 2: contains Cu superscript 2 plus. The name of CuO is copper (2) oxide.

b. A flowchart shows how SrO is named. If metal is present, then if the metal does not form more than one cation, (Sr (group 2) forms only Sr superscript 2 plus), then it is Type 1: cation takes element name. The name of SrO is strontium oxide.

c. A flowchart shows how B subscript 2 O subscript 3 is named. If there is no metal present, then it is Type 3: use prefixes. The name of B subscript 2 O subscript 3 is diboron trioxide.

d. A flowchart shows how TiCl subscript 4 is named. If metal is present, then if it does form more than one cation, (Ti is a transition metal), then it is Type 2: contains Ti superscript 4 plus. The name of TiCl subscript 4 is titanium (4) chloride.

e. A flowchart shows how K subscript 2 S is named. If metal is present, then if the metal does not form more than one cation, (Sr (group 1) forms only K superscript plus), then it is Type 1: (the name of SrO is strontium oxide).

f. A flowchart shows how OF subscript 2 is named. If there is no metal present, then it is Type 3. The name of OF subscript 2 is oxygen difluoride.

g. A flowchart shows how NH subscript 3 is named. If there is no metal present, then it is Type 3. The name of NH subscript 3 is ammonia. The systematic name is never used.

Self-Check: Exercise 5.5

· Name the following binary compounds.

a.

b.

c.

d.

e.

f.

See Problems 5.19, 5.20, 5.21, and 5.22.

Chemistry in Focus Chemophilately

Philately is the study of postage stamps. Chemophilately, a term coined by the Israeli chemist Zvi Rappoport, refers to the study of stamps that have some sort of chemical connection. Collectors estimate that more than chemical-related stamps have been printed throughout the world. Relatively few of these stamps have been produced in the United States. One example is a stamp honoring minerals that shows a copper nugget.

Chemists also have been honored on U.S. postage stamps. One example is a stamp printed in 1993 honoring Percy L. Julian, an African-American chemist who was the grandson of slaves. Julian is noted for his synthesis of steroids used to treat glaucoma and rheumatoid arthritis. As a holder of more than 100 patents, he was inducted into the National Inventors Hall of Fame in 1990.

In 1983 the United States issued a stamp honoring Joseph Priestley, whose experiments led to the discovery of oxygen.

A Russian stamp from 2009 pictures Dmitri Mendeleev, who, in 1869, arranged the known elements in the present form of the periodic table. Mendeleev’s arrangement allowed for the prediction of yet unknown elements and their properties.

In 2008, a stamp was issued that honors Linus C. Pauling, who pioneered the concept of the chemical bond. Pauling received two Nobel Prizes: one for his work on chemical bonds and the other for his work championing world peace. His stamp includes drawings of red blood cells to commemorate his work on the study of hemoglobin, which led to the classification of sickle cell anemia as a molecular disease.

Marie Curie also received two Nobel Prizes and was the first person to be so honored. She shared her Nobel Prize in Physics in 1903 with her husband, Pierre Curie, and Henri Becquerel for their research on radiation. She was the sole winner of the Nobel Prize in Chemistry in 1911 for the discovery and study of the elements radium and polonium. In 2011 (The International Year of Chemistry), many countries issued stamps honoring the 100th anniversary of Marie Curie winning the Nobel Prize in Chemistry.

Postal chemistry also shows up in postmarks from places in the United States with chemical names. Examples include Radium, ; Neon, ; Boron, ; Bromide, ; and Telluride, .

Chemophilately—further proof that chemistry is everywhere!