( Lithium ( ( has ( ( ( three protons ) and ) ( three electrons ) ) ) . ) )
(ROOT (S (NP (NNP Lithium)) (VP (VBZ has) (NP (NP (CD three) (NNS protons)) (CC and) (NP (CD three) (NNS electrons)))) (. .)))
Lithium has three protons and three electrons.
(ROOT (S (NP (NNP Lithium)) (VP (VBZ has) (NP (CD three) (NNS electrons))) (. .)))