7831
Complexes smaller than Mg ( 2 + ) ( H2O ) 3 cannot be formed in this source because charge separation into MgOH ( + ) ( H2O ) and H3O ( + ) is a lower - energy pathway than simple water loss from Mg ( 2 + ) ( H2O ) 3 .
 Chemical: Mg ( 2 + ) ( H2O ) 3; Chemical: MgOH ( + ) ( H2O ); Chemical: H3O ( + ); Chemical: Mg ( 2 + ) ( H2O ) 3
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Mg ( 2 + ) ( H2O ) 3; Chemical: MgOH ( + ) ( H2O ); Chemical: H3O ( + ); Chemical: Mg ( 2 + ) ( H2O ) 3