The atomic mass of an element is the weighted average mass of the atoms in a naturally occurring sample of that element. The atomic mass is typically expressed in atomic mass units (amu).
the atomic mass of iron (Fe) is approximately 55.845 amu. Please note that this value may have a slight variation due to more precise measurements.
For gold (Au), the atomic mass is approximately 196.966569 amu. Similarly, this value may have a small variation due to more accurate measurements.
It's important to note that periodic table values and atomic masses are periodically updated as more accurate measurements are made. Therefore, for the most up-to-date and precise atomic masses, it's advisable to consult reliable sources or scientific referencesdate.