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Which of the following method is used to write a chemical formula?

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Criss-cross method

Cross section method

Ion-exchange method

Criss-Cross method

answer is D.

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Detailed Solution

The criss-cross method is used to determine the chemical formula of the given compounds.

In the criss-cross method, the numerical value of the ion charge of the two atoms is crossed over, which becomes the subscript of the other ion.

For example- the Ion charge of Mg is +2 and the Ion charge of Cl is -1.

Hence, the chemical formula is MgCl₂

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