Question

please explain the criss cross system

Answer 1

Hi friend 

Here is your answer

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. 

To use this method, the absolute value of the oxidation number of the first ion is used as the subscript of the second, and vice versa. The subscripts are then reduced by the greatest common factor. For instance, to find the formula for aluminium oxide:

The oxidation number of Al is +3 and oxygen is -2. Criss cross the absolute values to give Al2O3

To find the formula for magnesium oxide:-

The oxidation number of Mg is +2 and oxygen is -2. Criss cross the absolute values to give Mg2O2In this example there is a common factor of 2 so divide by 2 to give MgO.

It is a helpful method just cross them and put them down without changes.

Hope this is helpful

Answer 2

Hi friend ,

Criss cross system is a system which is used to form the name compounds formed from the elements.
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In criss cross system we have to criss cross the valency and the name of the elements . For ex u can see in the pic. I have given above.
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Hope this helped u....
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