Question

Which of the following is used as the ‘reference standard’ used at present, for describing the atomic and molecular masses?
(A) Carbon-13
(B) Chlorine-35
(C) Oxygen-8
(D) Carbon-12

Answer 1

carbon 12 is used....

d is the answer

Answer 2

Dear Student,

◆ Answer - (D)

Carbon-12 is used as the reference standard at present, for describing the atomic and molecular masses.

● Explanation -

• Atomic mass is the mass of an atom of a chemical element expressed in atomic mass units.
• One atomic mass unit is taken as 1/12th of mass of Carbon-12 atom.

Thanks dear. Hope this helps you...