The number of electrons, protons and neutrons in a species are equal to 18, 16 and 16 respectively. Assign the proper symbol of the species.

Explanation

No. of protons =Atomic number `(Z) = 16`
The element is Sulphur (S).
No. of neutrons =16
Mass number `(A) =`
No. of Protons `+` No. of Neutrons `=16 +16 = 32`
The species is not neutral as no. of protons is not equal to no of electrons. it is anion with charge equal to excess electrons =`18 - 16 = 2`.
Symbol is `._(16)^(32)S^(2-)`