No, it is not possible to determine the atomic mass of an element without a periodic table or information about the number of neutrons. The atomic mass of an element is a weighted average of the masses of its isotopes, taking into account their relative abundances. Isotopes are variants of an element that have the same number of protons but different numbers of neutrons.
To determine the atomic mass, you need to know the masses of the isotopes present in the element and their respective abundances. This information is typically found in the periodic table, which provides the atomic masses and isotopic abundances for each element.
Without access to the periodic table or knowledge of the number of neutrons in an element's isotopes, it would be challenging to accurately determine the atomic mass. The periodic table serves as a valuable reference that provides comprehensive information about the elements, including their atomic masses and isotopic compositions.