1. Calculate the number of moles of helium:

* Molar mass of helium (He): 4.0026 g/mol

* Moles of helium: (2.88 g) / (4.0026 g/mol) = 0.72 mol

2. Calculate the number of helium atoms:

* Avogadro's number: 6.022 x 10^23 atoms/mol

* Atoms of helium: (0.72 mol) * (6.022 x 10^23 atoms/mol) = 4.34 x 10^23 atoms

3. Compare the number of atoms:

* Helium atoms: 4.34 x 10^23 atoms

* Zinc atoms: 16.4 atoms

Conclusion:

2.88 grams of helium has significantly more atoms than 16.4 zinc atoms.