Electron Density Lab: 1)What are the three types of bonding?     What does the description polar bond refer to?    The interactions between water molecules can be described as electrostatic or coulombic, where areas of positive charge are attracted to areas of negative charge

Electron Density Lab:

1)What are the three types of bonding?

2. What does the description polar bond refer to? 
   
    
3. The interactions between water molecules can be described as electrostatic or coulombic, where areas of positive charge are attracted to areas of negative charge. Draw a cartoon o how three water molecules might be arranged in space, given this electrostaticinteraction.

4. Provide a brief explanation as to why atoms may have different values of electronegativity.  What causes a low electronegativity? High?

5. Briefly describe the difference between a nonpolar covalent and polar covalent bond.

Part A

Select the two atom tab in the upper left hand corner of the simulator.  Turn on (check) all “View” options.  Investigate how the bond behaves when the atom's electronegativity is changed. 

1. What does             represent?
2. What does the symbol δ+ or δ- represent?
3. Adjust the electronegativities of atoms A and B.  Can an atom with a high electronegativity form a covalent bond?  Describe under what circumstances this can occur.
4. How does changing the electronegativity of the atoms affect the bond polarity?

5. Turn on (check) electron density in “Surface” options.  Describe how a molecule’s polarity is related to it electron density? How does the electron density around an atom with a δ- compare to the electron density around an atom with a δ+?

6. What scenarios can bring about a higher electron density around a particular atom?