what is cobalt oxide?\na. a chemical element\nb. a chemical compound\nc. a chemical mixture\nplease select…

Brief Explanations:

Cobalt oxide is formed by the chemical combination of cobalt and oxygen atoms. A chemical element is a pure substance made of only one type of atom. A chemical mixture is a combination of two or more substances that are not chemically combined. Cobalt oxide is a chemical compound as it has a fixed chemical - formula and is formed by chemical bonds between cobalt and oxygen.

Answer:

B. a chemical compound