"Intra-" vs. "Inter-"
Forces that hold atoms within a molecule together
What are Intramolecular Forces?
This attractive force is is named in honor of German-born American physicist Fritz London
What is the London Dispersion Force?
The electrostatic force between the partially positive end of one polar molecule and the partially negative end of another polar molecule.
What is a dipole-dipole attraction?
"Molecules with F-H, O-H, or N-H moieties are very strongly attracted to similar moieties in nearby molecules, (resulting in) a particularly strong type of dipole-dipole attraction called (this)" (10.1 Intermolecular Forces)
What is a Hydrogen bond?
Hydrogen bonds hold the two strands of this double helix molecule of life.
What is DNA?
Forces between molecules
What are Intermolecular Forces?
Larger and heavier atoms and molecules exhibit these than do smaller and lighter atoms and molecules.
What are stronger dispersion forces?
In comparing strengths, dipole-dipole forces are this compared to dispersion forces?
What are stronger?
A hydrogen bond can form between a hydrogen atom bonded to one of these elements.
What are Nitrogen, Oxygen, and Florine?
Hydrogen bonds hold the secondary structure of polymers of amino acids of this important macromolecule.
What are proteins?
An intramolecular force between a cation and an anion
What is an Ionic bond?
Dispersion forces result from the formation of these, for two nonpolar molecules.
What are temporary dipoles?
Identify which one of these molecules exhibits dipole-dipole attraction: HCl of F2?
What is HCl?
The atom in water that is partially negative.
What is Oxygen?
IMFs are important in application of these devices which are used to replace medical implants.
What are prosthetic implants?
The weaker forces
What are Intermolecular Forces?
These compounds—like methane (CH4) and nitrogen gas (N2)—only have London dispersion forces between molecules
What are nonpolar covalent compounds?
In a molecule of ICl the partially positive "I" of one molecule will be attracted to what of another ICl molecule?
What is the partially negative "Cl" ?
Qualities water has due to hydrogen bonding.
What are high boiling point, high surface tension, high heat of vaporization, etc?
IMFs play a role in medical drugs by causing the chemical to bind to this specific protein which cause further reactions.
What are receptors?
Intermolecular forces named after the Dutch physicist Johannes Diderik van der Waals.
What are Van der Waals forces?
Formed when an atom or molecule's electrons are distributed unsymmetrically about the nucleus, resulting in LDFs.
What are temporary dipoles?
When comparing two molecules of similar molecular masses, the one molecule with dipole-dipole attractions will have a higher this than the other molecule?
What is a higher boiling point?
The strength of hydrogen bonds is due to this.
What is a large difference in electronegativity creating a strong dipole-dipole attraction?
"Intermolecular forces are involved in...(this) with cell clumping occurring when the aggregation force is greater than the force of repulsion." (Fernandes, 2011)
What is agglutination?