Question

criss cross method for magnesium chloride

Answer 1

Mg - 2
Cl - 1
using criss cross method Mg subscript is1 and for Cl is 2

Answer 2

Magnesium chloride formula by criss cross method.

• The compound for which the formula must be worked is $MgCl_2$.
• The atoms involved in the formation of the compounds are magnesium and chloride.
• The valency of magnesium is 2, whereas chlorine is 1.
• When 1 atom of magnesium combines with 2 atoms of chlorine, magnesium chloride is formed.
• As the valency of atoms involved is given, with the help of the criss- cross method, the formula of magnesium chloride can be worked out through the following steps:

Valency of Magnesium (Mg) = 2

Valency of Chlorine (Cl) = 1

• On cross multiplication it gives 1 Mg and 2Cl,

∴ The formula of magnesium chloride through criss cross method is identified as $MgCl_2$.

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