The atomic mass and gram atomic mass (also known as molar mass) are not the same for every element. They are related concepts but have different units and numerical values.
Atomic mass refers to the mass of an individual atom of an element. It is typically expressed in atomic mass units (u) or unified atomic mass units (u), where 1 atomic mass unit is defined as 1/12th the mass of a carbon-12 atom. Atomic mass takes into account the masses of protons, neutrons, and electrons within an atom.
On the other hand, gram atomic mass or molar mass refers to the mass of one mole of atoms of an element. It is expressed in grams per mole (g/mol). One mole of any substance contains Avogadro's number of particles, which is approximately 6.022 x 10^23 particles. The molar mass of an element is numerically equal to its atomic mass in atomic mass units (u), but it is expressed in grams per mole.
For example, the atomic mass of carbon is approximately 12.01 u, while the molar mass of carbon is 12.01 g/mol. The atomic mass represents the mass of an individual carbon atom, while the molar mass represents the mass of one mole of carbon atoms.
In summary, the atomic mass and gram atomic mass are related but have different units and numerical values. The atomic mass is the mass of an individual atom, while the gram atomic mass or molar mass is the mass of one mole of atoms of an element.