Solution:The given statement is true.
Concept- The number of protons and neutrons in an atom are simply added to determine the atomic mass of that particular atom.
Consider an oxygen atom, for instance, which has 8 electrons, 8 protons, and 8 neutrons. You only need to multiply the atomic mass of oxygen by 8 protons and 8 neutrons.
Therefore, oxygen has an atomic mass of.
The periodic chart also includes the atomic mass of each element. The atomic mass is expressed in decimal numbers and atomic mass units in the periodic table.
Hence, the given statement is true.