An element has valency 3 . …
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Yogita Ingle 5 years, 3 months ago
An element with valency 3 can be written as X=+2
It is given that it forms an oxide which means it will react with oxygen which has a valency of 2. The “valency of oxygen” is written as O=-2.
We now use the criss-cross method of finding the valency of the oxide.
So we get
, Which is the required formula of oxide.
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