Question

Write down the formula of aluminium chloride by criss-cross method,

Answer 1

al~3+. cl~-1
crossing velocities
alCl3

Answer 2

The formula of Aluminium Chloride using the criss-cross method is AlCl₃.

• The steps are as follows:

1. Write the elements of the compound. Here the elements are Aluminium (Al) and Chlorine (Cl).
2. Write their respective valencies on the top of the elements. The valency of Al is +3 and that of Cl is -1.
3. Now cross multiply the valencies (without sign) to obtain the number of ions of the other element.
4. Here, we will get only one aluminum ion and 3 chloride ions.

• The diagram is attached below.