Question

which one of the following is used as standrad for atomic mass?​

Answer 1

Answer:

The C-12 isotope of the carbon is the stable isotope which is not much affected as compared to others elements, Thus it is chosen as the standard for expressing the atomic mass and the molecular mass of the substance. The reason is the isotope of Carbon as 6 protons and 6 neutrons in its nucleus (₆C¹²).

Answer 2

☑

$☑ Required \: Answer-}$

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

Explanation-:

The C-12 isotope of the carbon is the stable isotope which is not much affected as compared to others elements, Thus it is chosen as the standard for expressing the atomic mass and the molecular mass of the substance. The reason is the isotope of Carbon as 6 protons and 6 neutrons in its nucleus (₆C¹²).