How can we find the valency of an element

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- How to find the valency of an element
- How to find the valency of an element in periodic table
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- How find the valency of elements
- How to find out the valency of an element
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- How do you know the valency of an element
- How we find the valency of an element
- How do we find the valency of an element
- How can you find the valency of an element
- How can we determine the valency of an element
- How to find the valency of an element in a compound
- How the valency of an element is determined
- How does the valency of an element determine explain it with suitable example