Experiments show its molecular structure exhibits resonance, as the oxygen-oxygen bonds are both identical.
A powerful oxidizer, it deodorizes water and kills germs at concentrations of 1 part per million.  At even lower concentrations in air it causes coughing, chest pain, and eye irritation. Experiments show its molecular structure exhibits resonance, as the oxygen-oxygen bonds are both identical. For ten points, identify this poisonous blue gas, whose molecules each contain three atoms.
A powerful oxidizer, it deodorizes water and kills germs at concentrations of 1 part per million.  
ozone