Yes, average atomic mass is also known as relative atomic mass. The average atomic mass of an element represents the weighted average of the masses of all the naturally occurring isotopes of that element. Since elements can have multiple isotopes with different masses, the average atomic mass provides a value that reflects the abundance of each isotope in nature.
The average atomic mass is expressed in atomic mass units (u) and is typically listed in the periodic table for each element. It takes into account the masses of all the isotopes of an element and their relative abundances to calculate a single value that represents the typical mass of an atom of that element.
So, average atomic mass and relative atomic mass are essentially the same thing, referring to the mass of an element relative to a standard scale, usually based on the carbon-12 isotope.