Answer the following question given this paragraph: 

Make sure formulas of all reactants and products are correct before balancing the equation. Oxygen gas is a diatomic molecule. Potassium oxide is an ionic compound and so its formula is constructed by the crisscross method. Potassium as an ion becomes K + , while the oxide ion is O 2− .


Q: What kind of atomic molecule is oxygen gas?

 Choices:

- aromatic

- symbiotic

- dramatic

- diatomic

A:
diatomic
