An ion represented as AXy−^{A}\text{X}^{y-}AXy− has a mass number (AAA) of 34.
The number of electrons in this ion is 12.5% greater than the number of its protons, and the number of neutrons is equal to the number of electrons.
Which of the following correctly identifies the species AXy−^{A}\text{X}^{y-}AXy−?
34S2−^{34}\text{S}^{2-}34S2−
34S2+^{34}\text{S}^{2+}34S2+
34Cl−^{34}\text{Cl}^{-}34Cl−
34P3−^{34}\text{P}^{3-}34P3−
