What is the formula of Barium chloride?

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Solution

Barium is a Group 2 element, hence in its ionic form, it donates one valence electron (total two) to each chloride ion (of Group 17), creating an ionic compound.

Barium forms $B a^{2 +}$ and chloride means $C l^{-}$

To form neutral compound they combined in 1:2 ratio

The formula for barium chloride is $B a C l_{2}$

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