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polyatomic ion

   Also found in: Medical, Wikipedia 0.08 sec.
polyatomic ion [‚päl·ē·ə¦täm·ik ′ī·ən]
(chemistry)
An electrically charged species formed by covalent bonding of atoms of two or more different elements, usually nonmetals, for example, the ammonium ion (NH4+).


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It helps if you know the formula for a polyatomic ion, the common name for the antineuritic vitamin (thiamine), what an exothermic reaction is, and if you can work out complicated chemistry formulas and mathematical equations in your head in seconds.
QUIZ KIDS GET EARLY WARM-UP HIGH SCHOOLS REHEARSE FOR SCIENCE BOWL by Daily News (Los Angeles, CA)
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