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Answers
✏ The Thorpe's Crisscross method is a method of finding out the chemical formula of a metal and non-metal that combine to form an ionic bond created by high school chemistry teacher Kim Thorpe.
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EXPLANATION
(1) Magnesium chloride
Element's name - Magnesium chloride
Chemical name - Mg ↘ ↗ Cl
↗↘
Valency - 2 ↗ ↘ 1
∆✂ From Criss-Cross method ∆
Chemical formula formed = ( Mg )1 ( Cl )2
= MgCl2
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(2) Ammonium chloride
Element's name - Ammonium chloride
Chemical name - NH4 ↘ ↗ Cl
↗↘
Valency - 1 ↗ ↘ 1
∆✂ From Criss-Cross method ∆
Chemical formula formed = ( NH4 )1 ( Cl )1.
= NH4Cl
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