Naming Compounds Name _______________________________
Worksheet #3 date ________ per. _______
Systems for Naming Chemical Compounds
and Writing Formulas From Names.
I. Learn to identify types of compounds. Classify each compound as:
A. Acid formula begins with "H" (or ends with "-COOH")
B. Molecular formula has all nonmetals,
name uses prefixes; "mono-, di-, tri-, etc.
C. Ionic formula begins with a metal (or NH4), ends with a nonmetal
you may see Roman numerals in the name
II. Each type above has its own system of naming. KEEP TRACK OF WHICH TYPE OF COMPOUND YOU
ARE NAMING and work with that system.
Step III. Practice
Step IV. Practice, practice and practice
Step V. More Practice ? (YES ! )
(So . . . let’s practice ! ! !) Classifying compounds. Use the rules for the three types above.
the "staircase" in the
Use the position of the elements on the periodic table to identify them as: metals or nonmetals. (Find
upper right corner. Metals are below and to the left, nonmetals in the upper right .)
1. Label each of the following as: "A" (acid), "M" (molecular), or "I" (ionic)
Na2S CO2 Mg(OH)2 CaO KNO3 LiCH3COO HCl
Fe2SO4 ZnCr2O7 N2 O 5 KClO3 BaCl2 H2SO4 NH4Cl HNO3
PbI2 SF6 SO3 CuCl SnBr4 NaHCO3 P 2 O5
System ONE: NAMING ACIDS
The system for naming acids is quite involved and most of the acids you will see this year are on this list. You may pick up some
patterns and figure names of others on your own. (Your workbook explains it well on pp 160-169.)
We will keep this simple to start with. You need to learn only six of the
most common acids listed in your textbook on p71, table 2.8 and on p136,
1. Find the names of these acids now:
2. What do their formulas have in common?