( ( ( ( ( Outer shell ) ( filled ( by ( ( ( transferring electrons ) ( from one ) ) ( to ( ( another ( ( so that ) ( resulting positive ) ) ) ( -LRB- ( cations -RRB- ) ) ) ) ) ) ) ) and ) ( ( negative ( ( -LRB- ( anions -RRB- ) ) atoms ) ) ( have ( ( spherically symmetrical ) ( electron distributions ) ) ) ) ) . )
(ROOT (S (S (NP (JJ Outer) (NN shell)) (VP (VBN filled) (PP (IN by) (S (VP (VBG transferring) (NP (NNS electrons)) (PP (IN from) (NP (CD one))) (PP (TO to) (NP (NP (DT another) (ADJP (RB so) (DT that)) (JJ resulting) (NN positive)) (PRN (-LRB- -LRB-) (NP (NNS cations)) (-RRB- -RRB-))))))))) (CC and) (S (NP (JJ negative) (PRN (-LRB- -LRB-) (NP (NNS anions)) (-RRB- -RRB-)) (NNS atoms)) (VP (VBP have) (NP (ADJP (RB spherically) (JJ symmetrical)) (NN electron) (NNS distributions)))) (. .)))
Outer shell filled by transferring electrons from one to another so that resulting positive (cations) and negative (anions) atoms have spherically symmetrical electron distributions.
(ROOT (S (NP (NNS Electrons)) (ADVP (RB always)) (VP (VBP result) (PP (IN in) (NP (NP (DT an) (NN anion)) (SBAR (WHNP (WDT that)) (S (VP (VBZ is) (ADJP (ADJP (JJR larger)) (PP (IN than) (NP (DT the) (NN parent) (NN atom)))))))))) (. .)))