Question

Criss cross formula for writing the chemical formula

Answer 1

For Writing a Chemical Formula,

We Generally use Criss Cross method

For Example : Al₂O₃ (Aluminium Oxide)Here, Valency of Oxygen(O) is 2 and that of Aluminium(Al) is 3

So, We generally write it like Al(₃)O(₂) With their Respective Valencies and, Criss cross the Valencies (Exchange them)

Hence, It Becomes Al₂O₃

Now, Some more are here....

Potassium Hydroxide

Ammonium Chloride

Silicon Oxide

Silver Chloride

Zinc Chloride

Aluminium Chloride

Thanks :)