Modern atomic mass scale is based on the mass of: - Vidyadip

MCQ

Modern atomic mass scale is based on the mass of:

A
$H−1$
✓
$C−12$
C
$C−14$
D
$C−16$

✓

Answer

Correct option: B.

$C−12$

Modern atomic weight scale is based on $C−12.$
The standard unit for expressing the mass of atom is amu $($atomic mass unit$).$
It is equal to $\frac{1}{12}$ of the mass of an atom of carbon$-12$ equal to $1.6605 \times 10^{-19} \mathrm{~g}$.
amu is also called as avogram.
Avogram is a unit of mass and weight equal to one gram divided by the Avogadro's number.

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