Question

Write the chemical formula by using criss-cross method

Answer 1

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Answer 2

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Writing chemical formula :

The following steps should be taken while attempting to write a formula the method is called Criss cross method .

1. Write the symbols side-by-side basic radical is written first and then acidic radical .
2. Write the valency of each atom on top of its symbol .
3. Ignore the + or - symbols of the radicals .
4. Divide the valency numbers by the highest common factor (HCF) if any two get the simplest ratio .
5. interchange the valency is after radicals .
6. Write the interchange the valency numbers to the lower right of the radical left the radical is a group of atoms and has the valency number more than one enclose it within parentheses .

For eg:

Potassium Chloride - K1+Cl1-

potassium Bromide - K1+Br1-

potassium iodide - K1+I1-