1. Polyatomic Ions

2. Anions and Cations OH My!!!
Anions are Negative Ions
A Negative ION = ANION
Cations are Positive Ions
ca+ions (meow)

3. An anion (-) (pronounced æn. aɪ
An anion (-) (pronounced æn.aɪ.ən or an-eye-ən), from the Greek word ἄνω (ánō), meaning "up", is an ion with more electrons than protons, giving it a net negative charge.
A cation (+) (pronounced kæt.aɪ.ən or kat-eye-ən), from the Greek word κατά (katá), meaning "down", is an ion with fewer electrons than protons, giving it a positive charge.

4. Some Common Polyatomic Anions
Acetate CH3COO−
Carbonate CO3−2
Chlorate ClO3−
Chromate CrO4−2
Cyanide CN−
Dichromate Cr2O7−2
Hydroxide OH−
Nitrate NO3−
Nitrite NO2−
Permanganate MnO4−
Phosphate PO4−3
Sulfate SO4−2

5. Some Common Polyatomic Cations
meow
Ammonium NH4+
Hydronium H3O+

6. Disclaimer
Aloha I put together these power points for use in my science classes. You may use them in your classes. Some images are public domain, some are used under the fair-use provisions of the copyright law, some are mine. Copyright is retained by the owners!
Ted Brattstrom