.Write a short paragraph describing how electronegativity and molecular shape determine the polarity of a molecule. In your paragraph, descr

Question

.Write a short paragraph describing how electronegativity and molecular shape determine the polarity of a molecule. In your paragraph, describe why chemists consider relative electronegativity values and not absolute electronegativity values when determining the polarity of a bond. Also explain how a molecule with polar bonds can be non-polar overall

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Thành Công 5 years 2021-07-18T17:16:59+00:00 1 Answers 536 views 1

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  1. Gerda
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    2021-07-18T17:18:15+00:00
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    Answer:

    See explanation

    Explanation:

    Electro negativity refers to the ability of an atom in a molecule to attract the shared pair of electrons of a bond closer to itself.

    In a molecule, the polarity of bonds is determined by the relative electro negativity of the bonding atoms. If the difference in electro negativity between the atoms in a bond is significant, such a bond is polar in nature e.g H-Cl, H-Br, C-F, etc.

    However, the occurrence of polar bonds in a molecule alone does not guarantee the polarity of the molecule. The polarity of a molecule also depends on the shape of the molecule since dipole moment is a vector quantity.

    A molecule is polar when the resultant dipole moment which is determined by the shape of the molecule is non zero.

    For instance, CO2 contains two polar C-O bonds but the molecule is non polar because the two dipole moments cancel out. Also, symmetrical molecules are nonpolar irrespective of the presence of polar bonds in the molecule.

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