How do you weigh atomic mass?

Atomic Mass is determined using mass spectrometry, a technique that measures the mass-to-charge ratio of ions. In this process, atoms are ionized and accelerated through an electric and magnetic field, allowing for the separation of ions based on their mass. The resulting data is analyzed to calculate the average atomic mass, which reflects the relative abundances of the isotopes of an element. This value is usually expressed in atomic mass units (amu).