Answer: Valency of Al in
is +3.
Step-by-step explanation:
The capacity of an element to gain or lose electrons is called valency of the atom or element.
The valency of oxygen is -2 is the compound
and let the valency of Al is x over here.
Therefore, valency of x will be calculated as follows.
(as the charge on compound is 0)
![2x - 6 = 0](https://img.qammunity.org/2022/formulas/chemistry/high-school/q4rrm28jkvc2ay9ms9ntcis3c9bo07oeq3.png)
![x = +3](https://img.qammunity.org/2022/formulas/chemistry/high-school/63lstvplyuz1b4ahvwmoya7syzz9xybc6l.png)
Therefore, valency of Al in
is +3.