The atomic mass of an element is the ____.
Atotal number of subatomic particles in its nucleus
Bweighted average of the masses of the isotopes of the element
Ctotal mass of the isotopes of the element
Daverage of the mass number and the atomic number for the element
Atotal number of subatomic particles in its nucleus
Bweighted average of the masses of the isotopes of the element
Ctotal mass of the isotopes of the element
Daverage of the mass number and the atomic number for the element