Potassium and oxygen will combine to make a compound. k_o_ fill in the blanks with the number of the subscript.

First and foremost, we need to write at the word equation:

Potassium + Oxygen > Potassium Oxide

At this instant, we can write the symbol equation:

K(s) + O2(g) > K2O(s)

Then, balancing the equation we get

2K(s) + 0.5O2(g) > K2O(s)

ANSWER: K2O (Potassium Oxide)

D.na is the answer hope this