Answer
Barium as indicated by the symbol has only 1 possible ionic charge of 2+. Therefore, the name is simply barium ion.
Iodide as indicated by the symbol has only 1 possible ionic charge of 1-. Therefore, the name is simply Iodide ion.
Silver as indicated by the symbol has only 1 possible ionic charge of 1+. Therefore, the name is simply silver ion.
Mercury as indicated by the chemical symbol has multiple possible ionic charges. Therefore, a roman numeral is required to indicate the charge, being mercury (II) ion.
Work Step by Step
Barium as indicated by the symbol has only 1 possible ionic charge of 2+. Therefore, the name is simply barium ion.
Iodide as indicated by the symbol has only 1 possible ionic charge of 1-. Therefore, the name is simply Iodide ion.
Silver as indicated by the symbol has only 1 possible ionic charge of 1+. Therefore, the name is simply silver ion.
Mercury as indicated by the chemical symbol has multiple possible ionic charges. Therefore, a roman numeral is required to indicate the charge, being mercury (II) ion.
