Every isotope's contribution to the normal is controlled by how huge a fraction of the example it makes up. The general atomic mass is the normal of the atomic masses of the apparent multitude of various isotopes in an example. Since an element's isotopes have distinctive atomic masses, researchers may likewise decide the general atomic mass-once in a while called the atomic weight-for an element. The atomic mass number is usually rounded off to the nearest whole number. For example, a normal carbon atom with six neutrons and six protons is denoted as carbon-12. The atomic mass of a solitary atom is its absolute mass and is regularly expressed in atomic mass units or amu. Since we have seen the definition of atomic mass let us discuss it in detail. In this article, we will learn about the following things: the atomic mass of elements in detail, what is the atomic mass of all elements, and what is the atomic number and atomic mass of elements. An interesting point to note is that it is also referred to as atomic weight. The atomic mass is simply defined as the weighted average of all of the isotopes of an element, in which the mass of each isotope is multiplied by the abundance of that particular isotope. The atomic mass in Chemistry is the average mass of the atoms of an element measured in atomic mass units (amu).