Question

give an example of three element exhibiting rariable valency​

Answer 1

Answer:

Iron,copper,phosphorus

Explanation:

iron form compounds like FeO,FeCO3 with varible valency +2,+3

Copper form compounds like Cu2O,CuO with varible calency +1,+2

Phosphorus form compounds like PCl3,PCl5 with varible valency 3,5