NAMING COMPOUNDS

 

1.) How many elements does the compound contain?

If compound contains only two elements, go to # 2

     If compound contains more than two elements, go to # 3

 

2.) The compound is binary. Is the first element a nonmetal or a metal?
If the first element is a nonmetal, go to # 4

If the first element is a metal, go to # 5

 

3.) The compound is tertiary (or ternary). Is the first element a nonmetal or a metal?

If the first element is a nonmetal, go to #6

If the first element is a metal, go to # 5

 

4.) To name the compound:

~ 1st word = name of 1st element with prefix telling the # of the subscript*

~ 2nd word = prefix telling subscript, then name of 2nd element with -ide ending

*no prefix on first word if there is no subscript

 

5.) Is the metal in Group 1, 2, or Al, Zn, or Ag?
If metal is in Group 1, 2, or Al, Zn, or Ag, go to # 7

If metal is NOT in Group 1, 2, Al, Zn, or Ag, go to # 8

 

6.) To name the compound:

~ 1st word = ammonium

~ 2nd word = name of polyatomic ion or name of 2nd element with -ide ending

 

7.) To name compound:

~ 1st word = name of metal

~ 2nd word = name of 2nd element with -ide ending (if binary) OR
name of polyatomic ion (if tertiary)

 

8.) To name compound:

~ 1st word = name of metal

(Roman numeral indicating the oxidation number of the metal)

~ 2nd word = name of 2nd element with -ide ending (if binary) OR
name of polyatomic ion (if tertiary)

 

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EXAMPLES:
1.) P2O5

2.) MgSO4

3.) CuCl2

4.) (NH4)3PO4

5.) FeCO3

6.) K2O

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