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Molecules and Atomicity

Find the numb...

Question

Find the number of atoms in the following compound.
$P b (N O_{3})_{2}$

A

9

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B

7

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C

8

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D

6

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Solution

The correct option is D $9$
The number of atoms in $P b (N O_{3})_{2}$ is $1 + 2 (1) + 2 (3) = 1 + 2 + 6 = 9$ . It has one Pb atom, 2 N atoms and 6 O atoms.

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