Podcast
Questions and Answers
What type of forces allow atoms and molecules to approach and condense?
What type of forces allow atoms and molecules to approach and condense?
- Ionic interactions
- Van der Waals forces (correct)
- Metallic bonds
- Covalent bonds
Which type of interaction prevents matter from collapsing in on itself?
Which type of interaction prevents matter from collapsing in on itself?
- Hydrophobic interactions
- Hard sphere repulsion due to overlap of electron clouds (correct)
- Ionic interactions
- Van der Waals forces
What is the form of the potential energy due to simple van der Waals interactions?
What is the form of the potential energy due to simple van der Waals interactions?
- $U(r)=+a/r^{12}$
- $U(r)=-a/r^{12}$
- $U(r)=-a/r^6$ (correct)
- $U(r)=+a/r^6$
Which type of bonding is based on empirical models and has a potential energy model best represented by $U(r)=+a/r^{12}$?
Which type of bonding is based on empirical models and has a potential energy model best represented by $U(r)=+a/r^{12}$?
Which type of interaction is not mentioned as a main type of bonding in solids and liquids?
Which type of interaction is not mentioned as a main type of bonding in solids and liquids?
What forces act to overcome thermal agitation of atoms/molecules and allow them to approach and condense?
What forces act to overcome thermal agitation of atoms/molecules and allow them to approach and condense?
What is the role of Van der Waals (Dispersion) forces in condensed matter systems?
What is the role of Van der Waals (Dispersion) forces in condensed matter systems?
What type of interactions result from the transfer of electrons between atoms?
What type of interactions result from the transfer of electrons between atoms?
Which type of bonding involves sharing electrons between two or more atoms to fill valence shells or contribute to a delocalized sea of conduction electrons?
Which type of bonding involves sharing electrons between two or more atoms to fill valence shells or contribute to a delocalized sea of conduction electrons?
What characterizes 'hard' condensed matter systems?
What characterizes 'hard' condensed matter systems?
What materials are typically included in 'soft' condensed matter systems?
What materials are typically included in 'soft' condensed matter systems?
What plays an important role in soft matter systems apart from Van der Waals forces?
What plays an important role in soft matter systems apart from Van der Waals forces?
What is disrupted by the thermal motions of isolated atoms at room temperature?
What is disrupted by the thermal motions of isolated atoms at room temperature?
Which bonding type typically has energies of ~100-300$kT_{room}$ and is not easily disrupted by thermal motion?
Which bonding type typically has energies of ~100-300$kT_{room}$ and is not easily disrupted by thermal motion?
'Soft' condensed matter systems can display properties of both solids and liquids, including:
'Soft' condensed matter systems can display properties of both solids and liquids, including:
'Hard' condensed matter includes which of the following characteristics?
'Hard' condensed matter includes which of the following characteristics?
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