Edited Invalid date
10.1 Bonding Models and AIDS Drugs
The human immunodeficiency virus synthesized the Lewis Model molecule.
The virus's ability to cause AIDS is dependent on this particularprotein.
HIV can't spread in the human body without HIV-protease.
Without HIV-protease, AIDS can't develop.
Chapter 23 contains more information about the proteins.
Modelling how atoms bond together to form a molecule is used to determine how they would interact with a protease molecule.
Several drug molecules seemed to work by the early 1990s.
When given in combination with other drugs, saponins decrease the viral count in HIV-positive individuals to undetectable levels.
Many AIDS patients are still alive because of the drugs.
Bonding theories explain how atoms bond together.
They explain why some atoms are stable.
Bonding theories explain why water is H2O and not H3O.
Bonding theories predict the shapes of molecules, which in turn determine many of the physical and chemical properties of compounds.
These structures are fairly easy to draw.
Predicting whether a particular set of atoms will form a stable molecule is possible with minimal computation.
The Lewis model is the simplest model for making quick, everyday predictions about most molecules.
Why bonds form in the first place is the topic of our discussion.
The seemingly simple question is important.
There are only 91 naturally occurring elements in the universe.
We wouldn't be around to wonder why life would be impossible with such a poor diversity of substances.
The potential energy between the charged particles that compose atoms is lowered by chemical bonds.
You already know that atoms are made of particles with positive and negative charges.
Coulomb's law states that when two atoms approach each other, the electrons of one atom are attracted to the nucleus of the other.
The electrons of each atom repel the electrons of the other, and the nucleus of each atom repels the nucleus of the other.
There are interactions among a large number of charged particles.
A chemical bond forms if the interactions lead to a reduction of energy between the charged particles.
Bonding theories help us to predict the circumstances under which bonds form.
According to Metallic Electrons, metals tend to have low ionization energies and nonmetals tend to have negative electron affinities.
A nonmetal atom bonds with a metal atom.
The nonmetal atom is an anion.
Coulomb's law states that the oppositely charged ion attract one another and lower their potential energy.
In Chapter 9 we discussed that nonmetals have high ener gies and are difficult to remove.
Coulomb's law states that the shared electrons interact with the nuclei of the bonding atoms to lower their potential energy.
The most stable arrangement of two positively charged particles separated by a small distance and a negatively charged particle is the one with the lowest potential energy.
The negatively charged particle holds the two positively charged ones together.
Review flashcards and saved quizzes
Getting your flashcards
You're all caught up!
Looks like there aren't any notifications for you to check up on. Come back when you see a red dot on the bell!
Privacy & Terms