question_answer 2)

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

Answer:

Atomic number = Number of protons =16 Thus, the element is sulphur. Number of electrons is greater than number of protons hence it is a negatively charged ion\[({{S}^{-}})\]. Mass number = Number of protons + Number of neutrons = 16 + 16 = 32 Symbol of the ion will be \[_{16}^{32}{{S}^{2-}}\].