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Unformatted text preview: The Polyatomic Ides: Hydroxide, Cyanide, Peroxide There are three polyatomic ions that end in ide. Hydroxide and peroxide both have oxide in their names and oxygen in their formulas. Per means super. It is a shortened form of the word super. Peroxide is super oxygen. Its formula is O 2 2- . Here is a little rhyme to remember this formula: Super, super peroxide Too, too oxide Oh my, two minus Oh two two minus The word hydroxide is made from hydro and oxide. The root hydro means water as in fire hydrant, hydroelectric power, hydrated or dehydrated. Hydroxide is formed from water with one of the hydrogen atoms removed. H 2 O is water and OH 1- is hydroxide. Cyanide is carbon and nitrogen. In Spanish the letter y means and so you can remember C y a N ide as Carbon and and Nitrogen because the letters C and N are in the word...
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- Spring '09