Questions and Answers
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?
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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.
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