There are two: potassium and oxygen.
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nitrous oxide, or N2O contains two elements, Nitrogen and Oxygen
There are two elements, namely sodium and oxygen.
Two, Aluminum and Oxygen.
Just two: calcium and oxygen.
Two: copper and oxygen.
The elements found in ferrous oxide are iron (Fe) and oxygen (O).
Yes.
There are 2 elements in potassium oxide, which are potassium and oxygen.
not enough potassiun
As you answer suggests, the elements are hydrogen and oxygen. Hydrogen oxide???? I think you mean 'Water'. , which is hydrogen oxide. (H2O). Universally , hydrogen oxide is never referred to as such, but ALWAYS , water'.
Aluminium, Silicon, Zinc, Iron, and many more