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What is the valency of the element?

Answer 1

Caleb Adams

This is formally the number of hydrogen atoms to which an element will bind.

The term "valency" is outdated; instead, the terms "oxidation state and oxidation number" are more frequently used.

According to the definition, carbon has four valencies, boron and nitrogen have three, and halogens have one.

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Answer 2

Caleb Adams

See Explanation.

The quantity of electrons in an element's outermost shell determines its valency.

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Answer 3

Serenity Allen

An element's valency is determined by its capacity to form chemical bonds; this capacity varies amongst compounds, so the valency of a given element may vary depending on the circumstances surrounding the compound in question.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.