Question

what is the difference between atomic mass and atomic weight ?

Answer 1

Atomic mass (ma) is the mass of anatom. A single atom has a set number of protons and neutrons, so the massis unequivocal (won't change) and is the sum of the number of protons and neutrons in the atom. ... Atomic weightis a weighted average of the mass of all the atoms of an element, based on the abundance of isotopes.

Atomic mass is also known as atomic weight. Atomic mass is the weighted average mass of an atom of an element based on the relative natural abundance of that element's isotopes. The mass number is a count of the total number of protons and neutrons in an atom'snucleus.

Answer 2

Atomic mass: the mass of an atom of a element expressed in atomic mass units. It is equal to number of protons and neutrons in an atom.



Atomic weight: an isotope is one or more of an atom of the same element but have different mass numbers i.e., protons+neutrons