How is the atomic mass of an element related to its gram-atomic mass?

Not technically, it is the measurement of the mass of the nucleus within the atom of the element, which is not equal to the entire mass of the element, but most of it. For instance, an element with...

because they are the sameAdded: Atomic mass is the quantitive propertie of the mass of an atom, the atomic mass unit is the (standard) UNIT by which it is measured: 1 a.m.u. = 1.66*10-27 kg

1.52769575 × 10-22 grams and 92 amu

Chlorine