Honors Chemistry                                                        Name______________________

Nomenclature Packet—PMP 2—Non-ionic compounds

Mr. McAfoos                                                               Period______ Date____________

 

There are two skills that you must master, writing the formula of a compound when you are given the name and writing the name of a compound when you are given the formula.

 

Naming Formulas:

Non-ionic compounds are fairly simple to name.  We use a system of number prefixes to tell the amount of a particular element.  The prefixes are:

            mono - 1           hexa - 6

            di – 2                hepta - 7

            tri – 3              octa - 8

            tetra – 4          nona - 9

            penta – 5         deca - 10

 

For any given compound you simply tell how many and the identity of the elements giving the last element the ending "ide" (it sounds better).

 

Example 1:       P₄O₁₀                tetraphosphorus decoxide

 

Note: if an element (such as O) begins with a vowel (other than i) you may drop the last vowel in the prefix.  Decoxide rather than decaoxide)

 

Example 2:       B₂H₆    diboron hexahydride

 

For compounds that contain only one atom of the first element you may drop the "mono" prefix for the first element only.

 

Example 3:       CO₂                  carbon dioxide (not monocarbon dioxide)

 

You must however keep the prefix for all other elements in a compound even if there is only one of them.

 

Example 4:       CO                   carbon monoxide (not carbon oxide)

 

 

Formula Writing:

Since the name of any non-ionic compound contains number prefixes, writing the formula for non-ionic compounds is very straightforward. Simply write what the name says.

 

Example 1:       carbon tetrabromide

no prefix for the carbon so it must be mono (see example 3 above)

tetra = 4 so...   CBr₄

 

Example 2: diphosphorus pentasulfide            P₂S₅

Formula	Name	Formula	Name
1) As4O10		16) UF6
2) BrO3		17) OF2
3) BN		18) ClO2
4) N2O3		19) SiO2
5) NI3		20) BF3
6) SF6		21) N2S5
7) XeF4		22) CO2
8) PCl3		23) SO3
9) CO		24) XeF6
10) PCl5		25) KrF2
11) P2O5		26) BrCl5
12) S2Cl2		27) SCl4
13) ICl2		28) PF3
14) SO2		29) XeO3
15) P4O10		30) OsO4

 

Name	Formula	Name	Formula	Name	Formula
1) chlorine monoxide		11) sulfur dioxide		21) dinitrogen pentasulfide
2) oxygen difluoride		12) bromine pentafluoride		22) carbon monoxide
3) boron phosphide		13) disulfur dichloride		23) sulfur trioxide
4) dinitrogen monoxide		14) boron trifluoride		24) dinitrogen trioxide
5) nitrogen trifluoride		15) tetraarsenic decoxide		25) dinitrogen monoxide
6) sulfur tetrachloride		16) silicon tetrachloride		26) xenon hexafluoride
7) xenon trioxide		17) krypton difluoride		27) sulfur hexafluoride
8) carbon dioxide		18) chlorine monoxide		28) phosphorous pentachloride
9) diphosphorous pentoxide		19) silicon dioxide		29) nitrogen monoxide
10) phosphorous trichloride		20) boron trichloride		30) bismuth trichloride