Complex sentence: Divalent anions are atoms or radicals with 2 additional electrons when compared to their elemental state (that is, with 2 more electrons than protons); for instance, S 2-is the sulfide anion.
Split into simpler sentences: Divalent anions are atoms or radicals with two additional electrons when compared to their elemental state (that is, with 2 more electrons than protons). For instance, S 2-is the sulfide anion.