How would you determine the atomic weight of an atom?
It depends on how you define it.
If you're a chemist, then you would normally take "atomic weight" and "atomic mass" to just be "atomic mass". If you're a physicist, you probably would cringe at equating the two, because weight is in
I'll answer this from the physicist's perspective.
Atomic mass is just written directly on the periodic table. It's the one that has a lot of decimal places. So hydrogen's atomic mass is
Atomic weight, then, would be
#"W" = (1.00794)(9.80665)#
#color(blue)("= 9.88451 N/mol")#