## Chemistry (7th Edition)

1. Convert the number of atoms to number of moles of atoms: $4.61 \times 10^{21} atoms \times \frac{1 mole}{6.022 \times 10^{23}atoms} = 0.00766$ $moles$ 2. Calculate the molar mass of the compound. $\frac{0.815g}{0.00766moles} = 106g/mol$ 3. Since the molar mass is numerically equal to the atomic weight, we can use a periodic table to identify the element with molar mass equal to 106g/mol. - It is Palladium (Pd)