Solution:
The atomic number is equal to number of protons = 16.
The element is S.
Atomic mass number =
number of protons + number of neutrons
= 16 + 16 = 32.
The species is not neutral as the number of protons is not equal to number of electrons. It is negatively charged with charge equal to excess of electrons
= 18 – 16 = 2.
The symbol of the species is