Question

if both mass number and atomic mass is equal to the sum of protons and neutrons then what is the difference between them​

Answer 1

Answer:

Here's your answer friend.

Explanation:

Atomic mass is a weighted average of all of the isotopes of that element, in which the mass of each isotope is multiplied by the abundance of that particular isotope. Mass number is total amount of neutrons plus the total amount of protons present in an atom.

For example, Mass number of Neon is 20 (10 protons and 10 neutrons). Atomic mass of Neon is equal to the weighted average of Neon-20 (19.992 amu) with a abundance of 90.48&, Neon-21 (20.994 amu) with a abundance of 0.27% and Neon-22 (21.991) with an abundance of 9.25% is 20.18 amu