Identify the element and its atomic mass on the periodic table
Use the atomic mass in atomic mass units (amu)
Convert amu to grams if needed using 1 amu = 1.66054 × 10^-24 g
For one atom, multiply the atomic mass by 1.66054 × 10^-24 g
For a specific number of atoms, multiply the mass of one atom by the number of atoms
If using moles, multiply the molar mass by the number of moles
Use Avogadro’s number, 6.022 × 10^23 atoms/mol, when converting between atoms and moles