4565
Copper toxicity and accumulation in plants are affected by physicochemical characteristics of soil solutions such as the concentrations of coexistent cations ( e . g . , Ca ( 2 + ) , Mg ( 2 + ) , K ( + ) , Na ( + ) , and H ( + ) ) .
 Chemical: Copper; Chemical: Ca ( 2 + ); Chemical: Mg ( 2 + ); Chemical: K ( + ); Chemical: Na ( + ); Chemical: H ( + )
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: Copper; Chemical: Ca ( 2 + ); Chemical: Mg ( 2 + ); Chemical: K ( + ); Chemical: Na ( + ); Chemical: H ( + )