(a(i))[3]
Describe how these sulfur isotopes are alike and how they are different.
(a(ii))[1]
Explain why each of these isotopes has an overall charge of zero.
(a(iii))[1]
Explain why both isotopes have the same chemical properties.
(b(i))[1]
Explain why sulfide ions carry a charge of 2$^{-}$.
(b(ii))[2]
Give the formula of: an anion with the same electronic structure as S$^{2-}$; a cation with the same electronic structure as S$^{2-}$.