How can the shape of a molecule determine its polarity?A.A tetrahedral molecule will never be a polar molecule.B.A symmetrical molecule will only have nonpolar bonds.C.A linear molecule will always contain polar bonds.D.A symmetrical molecule cancels out the effects of polar bonds.
Question
How can the shape of a molecule determine its polarity?A.A tetrahedral molecule will never be a polar molecule.B.A symmetrical molecule will only have nonpolar bonds.C.A linear molecule will always contain polar bonds.D.A symmetrical molecule cancels out the effects of polar bonds.
Solution
The shape of a molecule can determine its polarity due to the distribution of electrons within the molecule. Here's a step-by-step explanation:
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Polarity in a molecule is determined by the difference in electronegativity between the atoms in the molecule. Electronegativity is a measure of how strongly an atom can attract a bonding pair of electrons. If there is a large difference in electronegativity, the bond will be polar.
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In a symmetrical molecule, the polarity of the bonds can cancel out. This is because the shape of the molecule ensures that the pull of the electrons is evenly distributed. This means that even if a molecule has polar bonds, it may not be a polar molecule. This is what option D is referring to.
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A tetrahedral molecule can be polar or nonpolar, depending on the atoms it is composed of. If all the atoms are the same, then the molecule is nonpolar because the electronegativity is the same for all the atoms, and the pull on the electrons is equal in all directions. If the atoms are different, then the molecule could be polar. This contradicts option A.
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A linear molecule will not always contain polar bonds. The polarity of the bonds in a linear molecule, like any other molecule, depends on the difference in electronegativity between the atoms. This contradicts option C.
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A symmetrical molecule does not only have nonpolar bonds. It can have polar bonds, but the overall molecule can still be nonpolar if the shape of the molecule allows the polarity of the bonds to cancel out. This contradicts option B.
So, the shape of a molecule can determine its polarity because it affects the distribution of the electron pull in the molecule. If the shape allows for an even distribution, the molecule will be nonpolar, even if it contains polar bonds.
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