Which one of the following will have the largest number of atoms?
(i) 1 g Au (s)
(ii) 1 g Na (s)
(iii) 1 g Li (s)
(iv) 1 g of `Cl_2`(g)

Explanation

To determine which of the given substances has the largest number of atoms in 1 gram, we will calculate the number of atoms for each substance using the formula:

\[ \text{Number of atoms} = \left( \frac{\text{Given weight (g)}}{\text{Atomic/Molecular weight (g/mol)}} \right) \times N_A \]

where \( N_A \) (Avogadro's number) is approximately \( 6.022 \times 10^{23} \) atoms/mol.

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