An atom of sulfur is represented by 3316s. how many neutrons are in the nucleus of this atom? express your answer as an integer.

In this question, the sulfur atom has atomic number 16 and atomic mass 33. The Atomic number represents the number of the proton inside the atoms and atomic mass represent the mass of the atoms. Since electron mass to small, the atomic mass can be interpreted as the sum of neutron and proton. Then, the number of the neutron would be:

mass = neutron + proton

33 = neutron+16

neutron = 17