7834
Additionally , the thermodynamic onsets leading to the charge - separation products from Mg ( 2 + ) ( H2O ) 3 and Mg ( 2 + ) ( H2O ) 4 are determined for the first time .
 Chemical: Mg ( 2 + ) ( H2O ) 3; Chemical: Mg ( 2 + ) ( H2O ) 4
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: Mg ( 2 + ) ( H2O ) 4