Polar and Non-Polar Molecules Distinction

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Which of the following is a characteristic of non-polar molecules?

They are made up of single element atoms or diatomic molecules with identical outer elements

What contributes to the polarity of a molecule?

Lone pairs of electrons and hydrogen bonding

Which of the following is an example of a polar molecule?

NH3

What type of bonding occurs in polar molecules?

Hydrogen bonding

Study Notes

  • The video discusses methods to distinguish polar molecules from non-polar ones.
  • Non-polar molecules are typically made up of single element atoms or diatomic molecules with identical outer elements.
  • Examples of non-polar molecules include O2, N2, CH4, and CO2.
  • Symmetric molecules with identical outer elements are also non-polar.
  • Non-polar molecules do not have significant electronegativity differences between their atoms.
  • Polar molecules, on the other hand, have hydrogen bonding or asymmetrical shapes.
  • Hydrogen bonding occurs when hydrogen is directly bonded to nitrogen, oxygen, or fluorine.
  • Examples of polar molecules include H2O, NH3, HF, and CH3OH.
  • Asymmetrical shapes and lone pairs of electrons also contribute to polarity.
  • Polar molecules have larger electronegativity differences between their atoms.
  • The presence of a dipole moment, which doesn't cancel in asymmetrical molecules, indicates polarity.

Learn about the methods used to differentiate between polar and non-polar molecules based on factors such as electronegativity differences, hydrogen bonding, and shapes. Explore examples of both polar and non-polar molecules and understand the concept of dipole moments.

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