To determine which has more atoms, we need to compare the number of moles of each element in 10 g of Al and Fe.

The number of moles (n) can be calculated using the formula:

n = mass (m) / molar mass (M)

The molar masses of Al and Fe are:

Al: 26.98 g/mol

Fe: 55.85 g/mol

Calculating the number of moles for 10 g of Al:

n(Al) = 10 g / 26.98 g/mol = 0.371 moles

Calculating the number of moles for 10 g of Fe:

n(Fe) = 10 g / 55.85 g/mol = 0.179 moles

Now, we compare the number of moles:

0.371 moles (Al) > 0.179 moles (Fe)

Since 10 g of Al has a greater number of moles compared to 10 g of Fe, it contains more atoms.

Therefore, 10 g of Al has more atoms than 10 g of Fe.