Cite the difference between atomic mass and atomic weight Ch

Cite the difference between atomic mass and atomic weight. Chromium has four naturally occurring isotopes: 4.34% of^50 Cr. with an atomic weight of 49.9460 amu; 83.79% of^52 Cr, with an atomic weight of 51.9405 amu;9.50% of^53 Cr, with an atomic weight of 52.9407 amu: and 2.37% of^54 Cr, with an atomic weight of 53.9389 amu. On the basis of these data, confirm that the average atomic weight of Cr is 51.9963 amu.

Solution

2.1=> Difference between atomic mass and atomin c weight.

The atomic mass is expressed in units of atomic mass unit, or amu, and consists primarily of the protons and neutrons in the atom\'s nucleus, making it closely match the mass number of an atom. When an element has two or more isotopes, the atomic weight is expressed as an interval with an upper and lower number. Both atomic masses and atomic weights are determined by mass spectrometry, a technique where electrically charged particles are separated by their masses.