Question

define atomic mass ... ??

Answer 1

Atomic mass is the sum of neutron and protons present in the nucleus of the atom.
Atomic mass (A) = number of protons+ number of neutrons.


Hope it helps..

Answer 2

Atomic mass:-

• An element's atomic mass is the sum of the weights of its atoms measured in atomic mass units (also known as daltons, D).
• The mass of an electron is a weighted sum of all the isotopes of such an element, calculated by multiplying the mass of every isotope by the abundance of such individual isotope.
• The atomic mass is the total of the masses of protons, neutrons, as well as electrons.
• The total mass of an element's naturally produced isotopes compared to the mass of a 12C atom gives one atom a relative atomic mass of exactly 12.