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Polyatomic Ions
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Anions and Cations OH My!!!
Anions are Negative Ions A Negative ION = ANION Cations are Positive Ions ca+ions (meow)
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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.
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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
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Some Common Polyatomic Cations
meow Ammonium NH4+ Hydronium H3O+
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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
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