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 Cl2(g)

Options

A. 1 g Au (s)
B. 1 g Na (s)
C. 1 g Li (s)
D. 1 g of `Cl_(2)(g)`

Answer

C

Explanation

Number of moles `=("mass")/("atomic masss")="x moles" =xN_(0)" atom"`
Thus, atoms `prop 1/("atomic mass")`
Least atomic mass is that of lithium.
Thus, Li have largest number of atoms.