ANSWERS: 3
-
Atomic weights are found on periodic tables.
-
By measuring the average mass of all the isotopes of an element. http://en.wikipedia.org/wiki/Atomic_weight
-
Using hydrogen as +1, you weigh identical amounts of elements on scales. You tally there weights by how much heavier they are compared to hydrogen.
Copyright 2023, Wired Ivy, LLC

by 