Question

Atomic mass of an element is ________. [ a ] 1/12th the mass of a chlorine atom. [b] 1/12 the mass of an oxygen atom.​

Answer 1

The atomic mass of an element is the average mass of the atoms of an element measured in atomic mass unit.

Answer 2

Answer:

atomic mass, the quantity of matter contained in an atom of an element. It is expressed as a multiple of one-twelfth the mass of the carbon-12 atom.