( ( Even ( if ( ( the ( added elements ) ) ( are nonmetals ) ) ) ) ( , ( alloys ( ( ( may still ) ( have ( metallic properties ) ) ) . ) ) ) )
(ROOT (S (SBAR (RB Even) (IN if) (S (NP (DT the) (VBN added) (NNS elements)) (VP (VBP are) (ADJP (JJ nonmetals))))) (, ,) (NP (NNS alloys)) (VP (MD may) (ADVP (RB still)) (VP (VB have) (NP (JJ metallic) (NNS properties)))) (. .)))
Even if the added elements are nonmetals, alloys may still have metallic properties.
(ROOT (S (NP (NNS Nonmetals)) (VP (VBP have) (NP (NP (DT the) (JJS highest) (NN attraction)) (PP (IN for) (NP (NNS electrons))))) (. .)))