Transcript Naming Covalent/Molecular Compounds

Naming Covalent/Molecular
Compounds
Naming Covalent Compounds
 Covalent compounds have a different
naming system since there are no ions
involved to balance the charges.
 Remember: Covalent bonds are
formed between non-metals.
 Therefore, covalent compounds are
only made up of non-metals.
 Covalent compounds are formed when
electrons are shared.
 There can be many different
compounds made up from the same
two elements.
 E.g. CO2 (carbon dioxide)
O
C
O
 Or CO (carbon monoxide)
C
O
Covalent Compounds are
Named Using Prefixes
1 - mono
2 - di
3 - tri
4 - tetra
5 - penta
6 - hexa
7 - hepta
8 - octa
9 - nona
10 - deca
 Simply use the correct prefix to tell how
many of each atom are in the
compound. You may leave out the
prefix mono only if it appears in front of
the entire name. Don’t forget to change
the ending to “ide”.
 1) PCl3
Phosphorus trichloride
 2) N2O4
Dinitrogen tetraoxide
 3) H20
Dihydrogen monoxide
 4) CF4
Carbon tetrafluoride
 5) SiO4
Silicon tetroxide
 Use the prefixes to tell you how many of
each atom. Then place this number as the
subscript.
 1) disulfur oxide
S2O
 2) nitrogen trichloride
NCl3
 3) Carbon monoxide
CO
 4) tetrabromine nonoxide
Br4O9
 5) arsenic trihydride
AsH3