No, elements do not have the same atomic mass. Atomic mass is a specific value associated with each element, representing the average mass of an atom of that element. It is determined by the number of protons, neutrons, and electrons in an atom.
Each element has a unique number of protons in its nucleus, which defines its atomic number. While different isotopes of an element may have varying numbers of neutrons, resulting in different atomic masses for those isotopes, isotopes of different elements will have distinct atomic masses.
For example, carbon has an atomic number of 6, indicating it has six protons. Carbon-12, the most common isotope of carbon, has 6 protons and 6 neutrons, giving it an atomic mass of 12 atomic mass units (amu). Carbon-13, another isotope of carbon, has 6 protons and 7 neutrons, resulting in an atomic mass of 13 amu. Although the atomic masses of these isotopes differ, they both belong to the element carbon.
In summary, while different isotopes of an element can have different atomic masses, the atomic masses of distinct elements are always unique.