With some chemical knowledge, you can fairly easily guess if a molecule will be polar or not. Each atom will have a different level of electronegativity, or ability to attract electrons. Actually calculating the polarity of a molecule precisely, however, requires determining the shape of the mole...
Two atoms that have very different electronegativities tend to formionic bonds. In an ionic bond, one atom takes an electron from the other atom. For example, sodium has an electronegativity of 0.9 while chlorine has an electronegativity of 3.0. Clearly, chlorine is much more electronegative tha...
Related to this QuestionWhat is the difference between polar, nonpolar bonds, and how these affect the polarity of a molecule overall? Explain how to determine if a molecule is polar including its bond polarity. What is polarity, and how ...
Explain how to determine if a bond is ionic or covalent or metallic. Covalent Bonding Covalent bonding is often explained as "electron sharing" where electrons are attracted to two different elements with the same force. In terms of orbitals, wavefunctions for electrons initially associat...
Approximately 30 years later, a French scientist by the name of Charles Augustin de Coulomb conducted several experiments to determine the variables affecting an electrical force. His work resulted in Coulomb's law, which states that like charges repel and opposite charges attract, with a force ...
Rh(I)-catalyzed cycloisomerizations of bicyclo[1.1.0]butanes provide a fruitful approach to cyclopropane-fused heterocycles. Products and stereochemical outcome are highly dependent on catalyst. The triphenylphosphine (PPh3) ligand provides pyrrolidines, placing substituents anti to the cyclopropyl group. ...
Most of us don't think about what's going on inside a copier while we wait for it to shoot out the copies. Find out how, in mere seconds, you can produce an exact replica of what's on a sheet of paper!
Because batteries provide direct current (DC), your battery-powered EL wires require an inverter, which converts DC into the AC you need. When it comes to inverters, two factors will help you determine what you need: the project you have in mind and the power you'll need to make it ...
Approximately 30 years later, a French scientist by the name of Charles Augustin de Coulomb conducted several experiments to determine the variables affecting an electrical force. His work resulted in Coulomb's law, which states that like charges repel and opposite charges attract, with a force ...
Comparing to a generic two-state model, our models can distinguish class I from class II MHCs and correlate their structural parameters with the TCR/pMHC’s potency to trigger T cell activation. The models are tested by mutagenesis using an MHC and a TCR mutated to alter conformation changes....