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Potassium Dichromate

OH- ion is a ...

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OH- ion is a polyatomic ion. It is made up of only two atoms. Then why NaCl and Na2O are not polyatomic ions even though they are made up of two atoms?

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Q. An ion that consists of more than one atoms is known as a polyatomic ion.

Q. Fill in the blanks.

If a monovalent polyatomic ion contains one hydrogen atom, one sulphur atom, and three oxygen atoms, then its name is ______ ion.

Q. Calculate the number of polyatomic ions which will use brackets when they are used.

O H

N H_{4}

C O_{3}

O C l

O H

P O_{4}

S O_{4}

$P_{4}$ is a example of _________ molecule.

Q. A polyatomic ion can be formed from two or more atoms of same or different elements.

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