Question

name the ionic species formed from: selenium & lithium
lithium monoselenide
selenium monolithide
lithium selenide
selenium lithide

Explanation:

Ionic compounds are named with the cation (metal, here lithium) first and the anion (non - metal, here selenium) second. Selenium forms a \(Se^{2 -}\) ion and lithium forms \(Li^{+}\) ions. The compound is formed by balancing the charges (\(2Li^{+}\) and \(1Se^{2 -}\)). The naming convention for such binary ionic compounds is to use the metal name (lithium) followed by the non - metal root (selen) with the suffix “-ide” (selenide). “Mono -” is not used in ionic compound naming (it is for covalent compounds).

Answer:

C. lithium selenide