Answer:
Explanation:
We consider valency as positive when we are studying only about valency.
But we consider positive and negative when it is variable valency.
So now consider it as positive for all elements.
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Answers & Comments
Answer:
Explanation:
We consider valency as positive when we are studying only about valency.
But we consider positive and negative when it is variable valency.
So now consider it as positive for all elements.