An element A forms an oxide A2O5.(a) What is the valency of element A?(b) What will be the formula of chloride of A?


(a) Element A forms an oxide A2O5. On crossing the valencies, we see that the valency of O (oxide) is −2 and that of element A is 5.

(b) Formula of chloride of A:
Element/Ion    A                      Cl
Valency             5                     −1
The formula of the chloride of element A (by crossing over the valencies) is ACl5.

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Updated on: 10-Oct-2022

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