Transcript Binary Covalent Compounds

Binary Molecular Compounds
• Two elements, usually nonmetals
• Familiar compounds use common
names:
NH3
CH4
H2O
**most are named in a systematic way
1. Element with the lower group number
in the periodic table is the first word in
the name
(exception: when the compound
contains oxygen and a halogen, the
halogen is named first)
2. If both elements are in the same group,
the one with the higher period number
is named first
3. The second element is named with its
root and the suffix –ide
4. Use Greek numerical prefixes to indicate
the number of atoms of each element in
the compound.
-The first word has a prefix only when
more than one atom of the element is
present
-the 2nd word always has a numerical
prefix
Prefixes for Binary Molecular
Compounds
Number
Prefix
1
Mono-
2
Di-
3
Tri-
4
Tetra-
5
Penta-
6
Hexa
7
Hepta-
8
Octa-
9
Nona-
10
Deca-