Question

what is dofnetion of atomic maas

Answer 1

The mass of an atom of a particular chemical substance is called it's atomic mass .
For example : Atomic mass of Boron is 10, Carbon 12

Answer 2

$\huge{ \bold{Atomic Mass:-}}$
✔ Atomic mass of an element is the average relative mass of its atoms as compared with an atom of carbon -12 taken as 12.

✔ Atomic mass unit(amu) : Today known as unified mass (u) is a mass exactly equal to 1/12 the mass of an one carbon-12 atom .

✔1amu= 1.6605056×10^-24g

In short => It is a characteristic of an atom that is a measure of its size.

✔It is also known as atomic weight.

THANKS ✔