The binary ionic compound with the formula SrSe is called Strontium Selenide.
To break it down, Sr represents Strontium, which is an alkaline earth metal. Se represents Selenium, which is a non-metal. In binary ionic compounds, the metal typically comes first, followed by the non-metal. When naming such compounds, the metal keeps its name, while the non-metal’s name is modified to end in ‘-ide’. Therefore, combining the names gives us Strontium Selenide.