Question

How to find atomic mass of an element

Answer 1

the total number of proton and neutron is called as atomic mass

Answer 2

SOLUTIONS:

In order to present a definition of atomic mass, we should first new the meaning of carbon-12 atom.

» Carbon-12 atom is that atom of carbon which has 6 protons and 6 neutrons in its nucleus so that its mass number is 12.

» Carbon-12 item has been assigned an atomic mass of exactly 12 atomic mass units.

Atomic mass unit = 1/12 the mass of a carbon-12 atom.

Also, the atomic mass of an element is the relative mass of its atom as compared with the mass of a carbon-12 atom taken as 12 units.

The present standard for atomic masses is carbon-12 atom which has been assigned an atomic mass of exactly 12 u.