Polyatomic Ions

Anions and Cations OH My!!!

Anions are Negative Ions

A Negative ION = ANION

Cations are Positive Ions

ca+ions (meow)

• 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.

Some Common Polyatomic AnionsAcetate 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

Some Common Polyatomic Cations

Ammonium NH4+

Hydronium H3O+

meow

DisclaimerAloha

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