2. TARGETS
I can name binary molecular compounds given
the formula.
I can determine the formula of a binary
molecular compound given the name.
3. GREEK PREFIXES
Binary molecular compounds are named using
Greek prefixes.
1 Mono 6 Hexa
2 Di 7 Hepta
3 Tri 8 Octa
4 Tetra 9 Nona
5 Penta 10 Deca
4. BINARY MOLECULAR COMPOUNDS
NAMING RULES
1. The first element in the formula is named first,
and the full element name is used.
2. The second element is named by dropping the
ending and adding –ide.
3. Prefixes are used to denote the number of atoms
present.
4. The prefix mono- is never used for naming the
first element. For example, CO is called carbon
monoxide, not monocarbon monoxide.
5. If the element name begins with a vowel, the
vowel is typically dropped from the prefix name.
For example CO4 would be called carbon
tetroxide, not carbon tetraoxide.
5. PRACTICE
Name the following compounds
1. CO2
2. CCl4
3. SO3
4. N6O9
5. S5Br10
6. PRACTICE
Name the following compounds
1. CO2 - carbon dioxide
2. CCl4 - carbon tetrachloride
3. SO3 - sulfur trioxide
4. N6O9 - hexanitrogen nonoxide
5. S5Br10 - pentasulfur decabromide
7. BINARY MOLECULAR COMPOUNDS
FORMULA WRITING
1. The prefix is translated and written as a
subscript to the right of the element symbol.
2. The elements are written in the formula in the
order they appear in the name. For example,
carbon tetroxide would be written as CO4.
8. PRACTICE
Write the correct formula for the following
compounds:
1. Dinitrogen pentoxide
2. Iodine trichloride
3. Sulfur hexafluoride
4. Xenon tetrafluoride
5. Heptaphosphorus decoxide
9. PRACTICE
Write the correct formula for the following
compounds:
1. Dinitrogen pentoxide – N2O5
2. Iodine trichloride – ICl3
3. Sulfur hexafluoride – SF6
4. Xenon tetrafluoride – XeF4
5. Heptaphosphorus decoxide – P7O10
