* Atomic Mass: The atomic mass is primarily determined by the number of protons and neutrons in an atom's nucleus.
* Neutrons: You're given that the atom has 8 neutrons.
* Protons: To find the number of protons, subtract the number of neutrons from the atomic mass: 16 - 8 = 8 protons.
* Atomic Number: The number of protons defines the element. An atom with 8 protons is oxygen (O).
Therefore, the element with an atomic mass of 16 and 8 neutrons is oxygen (O).
