You have a sample of zinc (Zn) and a sample of aluminium (Al). You have an equal number of atoms in each sampl

The m of the Zn sample is more than twice as great as the m of the Al sample. If you have 6.022x10^23 number of atoms of each, the Al would weigh 26.98g and the Zn would weigh 65.55g. All you have to do is compare the mes from the periodic table.