( ( ( The radiation ) ( produced ( from ( radioactive atoms ) ) ) ) ( ( is ( emitted ( in ( ( ( ( ( ( ( ( several forms ) , ) ( most commonly ) ) , ) ( alpha ( and ( beta particles ) ) ) ) , ) and ) ( gamma rays ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN radiation)) (VP (VBN produced) (PP (IN from) (NP (JJ radioactive) (NNS atoms))))) (VP (VBZ is) (VP (VBN emitted) (PP (IN in) (NP (NP (JJ several) (NNS forms)) (, ,) (ADVP (RBS most) (RB commonly)) (, ,) (NP (NN alpha) (CC and) (NN beta) (NNS particles)) (, ,) (CC and) (NP (NN gamma) (NNS rays)))))) (. .)))
The radiation produced from radioactive atoms is emitted in several forms, most commonly, alpha and beta particles, and gamma rays.
(ROOT (S (PP (IN Of) (NP (NP (DT the) (CD three) (JJ basic) (NNS types)) (PP (IN of) (NP (JJ radioactive) (NNS emissions))))) (, ,) (NP (DT the) (NN gamma) (NN particle)) (VP (VBZ is) (NP (DT the) (JJS most) (NN penetrating))) (. .)))