Question

Question #4c34a

Answer 1

Relative atomic mass (`A_text(r)`) is the ratio of the average mass of an atom of an element to 1 u.

Explanation:

Relative atomic mass has no units.

For example, the relative atomic mass of chlorine is

`A_text(r) = (35.45 color(red)(cancel(color(black)("u"))))/(1 color(red)(cancel(color(black)("u")))) = 35.45`

Thus, relative atomic mass has the same numerical value as the average atomic mass on the Periodic Table.