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dumbo72
Barium has a 2+ charge as it is in group 2 in the periodic table and so it has two electrons in its outer shell and chloride has a -1 charge on its chloride ion. So we will need two of the chloride ions as we have a 2+ charge to match the amount of charge on one barium ion- forming barium ion

BaCI2

Explanation:

Atomic number of barium is 56 and its electronic configuration is [tex][Xe]6s^{2}[/tex].

Since, barium is a group 2 metal so in order to attain stability it will readily lose two electrons. Hence, barium will acquire a +2 charge and forms [tex]Ba^{2+}[/tex] ion.

On the other hand, chlorine is a group 17 element and its electronic distribution is 2, 8, 7. Hence, to attain stability it will gain one electron and forms [tex]Cl^{-}[/tex] ion.

Thus, we can conclude that charge on barium ion is +2 and charge on chlorine ion is -1.

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