Question

name elements present in a l 23 and write the valencies of all the elements present in the compound​

Answer 1

Answer:

The elements present in Aluminium Oxide($Al_{2} O_{3}$) are

(1). aluminum

(2). oxygen

The valency of aluminum in ($Al_{2} O_{3}$) is +3

i.e, As oxidation state of oxygen is -2

     2x+3(-2)=0

       2x=6

      x=+3

The valency of oxygen in ($Al_{2} O_{3}$) is +2

i.e, As the oxidation state of aluminum is +3

       3x=2(3)

        x=+2