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11. Arrange the ions into their valency

Arrange the following ions into monovalent, divalent and trivalent:
Answer variants:
\( Fe^5+\)
\( Hg^2{^+}\)
\( Cs^+\)
\( B^3{^-}\)
 
1. Monovalent -
 
2. Divalent - 
  
3. Trivalent -
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