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Chemistry LibreTexts

8.E and 9E: Bonding Concepts


Indicate the number of valence electrons in the following:

  1. oxygen                                                 
  2. Group 1
  3. an element with an electron configuration of 1s22s22p63s23p1



List the following elements in order of increasing electronegativity:  O, Ge, C



Choose the atom or ion in each set with the smallest atomic radius.

  1. Li, Li+, H                               
  2. Na+, Cl, K+                      
  3. F, O2-, F



List at least 2 ions with each of the following electron configurations:

  1. 1s22s22p6          
  2. 1s22s22p63s23p6     
  3. 1s22s22p63s23p64s23d104p65s24d105p6



What is the term for two ions with the same electron configuration?



Draw Lewis structures for the following compounds:  (Follow the Octet Rule.)

  1. H2S      
  2. Br2             
  3. NH2F         
  4. CH2I2        
  5. CO32-         
  6. SO32-
  7. diphosphorus dichloride    
  8. dinitrogen tetroxide   
  9. C3H4Cl2      
  10. C3H4



Indicate the molecular geometry of compounds (a)-(d) in question 6.  For each of these compounds, indicate whether they are polar or nonpolar.



Add hydrogen atoms and electrons in order to complete Lewis structures of the following compound:    C3H6O (acetone; nail polish remover)



Explain the basis of a covalent bond. What makes a bond polar? What makes a molecule polar?



Which is a better predictor of chemical properties:  Period number or Group number?



For each set below, indicate which bond would be the most polar:

  1. C - F, N - F, or O - F                        
  2. Si - F or C - F



Indicate the molecular geometry of the following compounds (which disobey the octet rule):

  1. SF4                   
  2. XeF4                       
  3. PF5                        
  4. SeF6


Indicate the hybridization of the following atoms:

  1. C in CH2I2                   
  2. C in CO2               
  3. Xe in XeF4
  4. S in SF4                       
  5. C in CO32-             
  6. P in diphosphorus dichloride


Indicate the number of sigma bonds and the number of pi bonds in the following molecules:

  1. CH2I2                          
  2. CO32-                    
  3. CO2                       
  4. CH3COCH3