( Ozone ( ( ( ( is ( a ( ( more reactive ) form ) ) ) , ) ( with ( ( three ( oxygen atoms ) ) ( per molecule ) ) ) ) . ) )
(ROOT (S (NP (NN Ozone)) (VP (VBZ is) (NP (DT a) (ADJP (RBR more) (JJ reactive)) (NN form)) (, ,) (PP (IN with) (NP (NP (CD three) (NN oxygen) (NNS atoms)) (PP (IN per) (NP (NN molecule)))))) (. .)))
Ozone is a more reactive form, with three oxygen atoms per molecule.
(ROOT (S (NP (CD Three) (NN oxygen) (NNS ions)) (VP (VBP make) (PRT (RP up)) (NP (DT an) (NN ozone) (NN molecule))) (. .)))