What is the atomic mass constant symbol?

The atomic mass constant, which is a crucial value in the field of atomic physics and chemistry, is represented by the symbol Mu (µ). This constant is defined as one twelfth of the mass of an unbound neutral atom of carbon-12 in its nuclear and electronic ground state. It serves as a reference point for atomic masses of all elements, allowing scientists to compare the mass of different atoms and isotopes relative to a standard, which is particularly useful in various chemical and physical calculations.

The other symbols do not represent the atomic mass constant. "Me" could be misconstrued as a symbol for electron mass or energy, whereas "Mx" and "Ma" do not correspond to any commonly recognized scientific constants in the context of atomic mass. Therefore, the correct representation of the atomic mass constant is indeed µ.