Final answer:
The atomic mass of an element comes from its nucleus and is the total number of protons and neutrons. This mass is reported in atomic mass units (amu) and is a weighted average of the masses of the naturally occurring isotopes of the element can be calculated by adding the number of neutrons and protons together.
Step-by-step explanation:
The atomic mass of an element comes from its nucleus. The atomic mass number is the total number of protons and neutrons in the nucleus of an atom. This mass is reported in atomic mass units (amu) and is a weighted average of the masses of the naturally occurring isotopes of the element. The mass number can be calculated by adding the number of neutrons and the number of protons together.
atomic mass of an element comes from its nucleus and is the total number of protons and neutrons. This mass is reported in atomic mass units (amu) and is a weighted average of the masses of the naturally occurring isotopes of the element can be calculated by adding the number of neutrons and protons together.