Notes on Polyatomic Ions
Polyatomic Ion – _________________ atoms bonded together that act as an
_______________and have an overall ________________.
Can act as a ___________or a ________________ ion.
Rules:
1.
If more than one group is needed to balance a formula, the group must be
enclosed in parenthesis before adding the subscript.
Example:
2.
Patterns:
ate
the standard version of the ion
Example:
ite
1 less oxygen that ate. The charge does not change
depending on how many oxygen atoms are involved
Example:
per
1 more oxygen than ate
Example:
hypo
1 less oxygen that ite. Hypo means below.
Example:
3.
Patterns:
ates with charges less than -1 can have hydrogen added to them.
For each hydrogen added the charge is increased by +1
Example: