Question

Checmical formula of barium chloride by cris cross method only

Answer 1

Formula of barium = Ba
Valency = 2

Formula of chloride = Cl
Valency = 1

The Valency gets exchanged (i.e. Ba gets 1 and Cl gets 2)

Therefore, the formula becomes BaCl2.

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Answer 2

The chemical formula of barium chloride is $BaCl_2$.

• The element Barium or Ba has a valency of 2.
• Cl has a valency of 1. It is a halogen element and has an atomic number of 17.
• By the criss-cross method, their valency gets exchanged and Ba gets 1 and Cl gets 2.
• Hence the chemical formula of barium chloride is $BaCl_2$.