What do polar covalent bonds result from?

Answer 1

The difference between electronegativity of the binding atoms.

(Refer to the periodical table element with electronegativity value) Consider a bond to be non-polar if this difference is smaller than #0.4# (or #0.2 ~ 0.5# in certain cases ) Also, bonds are no longer considered "covalent" if the difference is greater than #2.0#, as electron "transfer" occurs.
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Answer 2

Polar covalent bonds result from unequal sharing of electrons between atoms, where one atom has a higher electronegativity than the other. This unequal sharing creates partial positive and partial negative charges on the atoms involved.

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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.

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.

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.

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.

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