Question
Thu March 03, 2011 By: Aishanikhanna
 

Dear maam/sir, what are polyatomic ions? give any 2 egs.

Expert Reply
Thu March 03, 2011
Dear Student
 
 A polyatomic ion are also known as a molecular ion.
 These are charged species (ion) composed of two or more atoms covalently bonded or of a metal complex that can be considered as acting as a single unit in the context of acid and base chemistry or in the formation of salts. The prefix "poly-" means "many," in Greek, but even ions of two atoms are commonly referred to as polyatomic.
 
Examples :  a hydroxide ion is made of one oxygen atom and one hydrogen atom: its chemical formula is (OH)−, similarly SO42−, (NH4)+.
 
 
We hope that clarifies your query.
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