Upload
valentine-hill
View
238
Download
1
Embed Size (px)
DESCRIPTION
3. Add a prefix to both words to indicate the number of atoms 1.mono-6. hexa- 2.di-7. hepta- 3.tri-8. octa- 4.tetra-9. nona- 5.penta-10. deca-
Citation preview
Naming Binary Molecular Compounds
2 elements covalent bond
3 Rules to Name
1. Name the first element using the entire name2. Second element in the formula- use the root
word and end in –ideex: Oxygen Sulfur Hydrogen
OxideSulfideHydride
3. Add a prefix to both words to indicate the number of atoms
1. mono- 6. hexa-2. di- 7. hepta-3. tri- 8. octa-4. tetra- 9. nona-5. penta- 10. deca-
2 Exceptions to the rule
1. When the formula contains one atom of the first element, omit mono
ex: CO2 Carbon DioxideNot: Monocarbon Dioxide
2 Exceptions to the rule
2. Drop the final letter in the prefix if the element begins with a vowel
- For prefixes 1 & 4-9ex: CO Carbon monoxide
Not: Carbon monooxide
Example 1
S4N2
sulfur nitrogen
tetra di
nitride
tetrasulfur
dinitride
Example 2
SO3
Only one atom of sulfur
sulfur
- so no prefix needed
oxide
tri
oxygen
tri
Example 3
P4S5
tetra sulfide
penta
sulfurpenta
tetra
phosphorus
Example 4
CO
Only one atom of carbon
carbon
- so no prefix needed
oxide
mono
oxygen
mon NOT monooxide
Example 5
NH3
Only one atom of nitrogen
nitrogen
- so no prefix needed
hydride
tri
hydrogentri More Common
Name is “ammonia”
Example 6
CH4
Only one atom of carbon
carbon
- so no prefix needed
hydride
tetra
hydrogen
tetra More Common Name is “methane”
Example 7-9
Example 7: As2O3
Diaresenic trioxide
Example 8: N2O5
Dinitrogen pentoxide
Example 9: P4O10
Tetraphosphorus decaoxide