Answer: potassium oxide.
Explanation:
[tex]K_2O[/tex] is an ionic compound because potassium element is a metal and oxygen element is a non-metal. The bond formed between a metal and a non-metal is always ionic in nature.
The nomenclature of ionic compounds is given by:
1. Positive is written first.
2. The negative ion is written next and a suffix is added at the end of the negative ion. The suffix written is '-ide'.
Hence, the name of [tex]K_2O[/tex] is potassium oxide.
