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4 votes
Which of the following is not a polyatomic ion?

A. NH4
B. OH
C. NO2
D. NO3
E. None of the Above

2 Answers

4 votes
the answer is B. OH. because "poly" means many
User Clementine
by
7.1k points
7 votes

the new version of the test the answer is changed to

Ca2+

User Fuk
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8.0k points