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

Explanation

The atomic number is equal to number of protons = 16. The element is sulphur (S). Mass number = number of protons + number of neutrons = 16+ 16 = 32 Species is not neutral as the number of protons is not equal to electrons It is anion, (negatively charged) with charge equal to excess electrons =18-16 = 2. Symbol is `""_16^32""s^(-2)`