Final answer:
The sulfur atom with a mass number of 32 and 16 protons has 16 electrons and 16 neutrons.
Step-by-step explanation:
The mass number of an atom is the sum of the number of protons and neutrons in its nucleus. In this case, the sulfur atom has a mass number of 32, which means it has 16 protons and 16 neutrons.
The number of electrons in an atom is equal to the number of protons in the nucleus. So, the sulfur atom also has 16 electrons.
Therefore, the correct answer is option D. 16 electrons and 16 neutrons.