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Naming Binary Covalent Compounds

 

 

Rules

1. The first element is named first, using the elements name.

2. Second element is named as an Anion (suffix "-ide")

3. Prefixes are used to denote the number of atoms

4. "Mono" is not used to name the first element

Note: when the addition of the Greek prefix places two vowels adjacent to one another, the "a" (or the "o") at the end of the Greek prefix is usually dropped; e.g., "nonaoxide" would be written as "nonoxide", and "monooxide" would be written as "monoxide". The "i" at the end of the prefixes "di-" and "tri-" are never dropped.

 

Prefix number indicated
mono- 1
di- 2
tri- 3
tetra- 4
penta- 5
hexa- 6
hepta- 7
octa- 8
nona- 9
deca- 10

Try a few formulas and names

 

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Formula Names
N2F6 Dinitrogen Hexafluoride
CO2 Carbon Dioxide
SiF4 Silicon Tetrafluoride
CBr4 Carbon Tetrabromide
NCl3 Nitrogen Trichloride
P2S3 Diphosphorous Trisulfide
CO Carbon Monoxide
NO2 Nitrogen Dioxide
SF2 Sulfur Difluoride
PF5 Phosphorous Pentafluoride
SO2 Sulfur Dioxide
NO Nitrogen Monoxide
CCl4 carbon tetrachloride
P2O5 diphosphorus pentoxide

Naming Covalent Compounds   Naming Binary Ionic Compounds  Polyatomic Ions Naming with Polyatomic Ions  Naming with Roman Numerals  Formula Writing  Naming Acids

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