Question

(i) Name the element used as standard for atomic mass scale.
(ii) Which particular atom of the above element is used for this purpose?
(iii) what value has been given to the mass of this reference atom?

Answer 1

(i) Carbon is used as a standard for the atomic mass scale.

(ii) IUPAC adopted the mass of carbon (C₁₂) isotope as the standard unit to measure.

(iii) IUPAC adopted one-twelfth of the mass of carbon (C₁₂) isotope as the reference atom.