What is the difference between a nonpolar covalent bond and a polar covalent bond?

Answer 1

In a non-polar covalent bond, two similar atoms form a bond where there is no electronegativity difference, such as H—H. In a polar covalent bond, on the other hand, there is an electronegativity difference, leading to the development of a partial +ve and partial -ve charge, such as H+——---Cl-

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Answer 2

Jeremiah Adams

When electrons are distributed evenly among the atoms in a covalent bond, there is no net dipole moment; in contrast, when electrons are distributed unevenly, there is a partial positive and negative charge on the atoms involved in the covalent bond.

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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.