Final answer:
The compound CsMnO4 is correctly named as cesium permanganate, combining the names of cesium and the polyatomic ion permanganate.
Step-by-step explanation:
The correct name for the compound with the formula CsMnO₄ is cesium permanganate. In this formula, Cs represents cesium, and MnO₄ represents the permanganate ion. Permanganate is a polyatomic ion with a charge of -1 and consists of one manganese atom (Mn) and four oxygen atoms (O), which is why the name of the compound includes the term 'permanganate' to indicate this specific group.