Written Assignment 9: Chemical Bonding

1. Use the second member of each group from Group IA to Group 7A to show that the number of valence electrons on an atom of the element is the same as its group number.  
2. Explain the following: (3 points); ionic bond, nonpolar covalent bond and polar covalent bond.  
3. Specify which compound in the following pairs of ionic compounds has the higher lattice energy: Explain your choice. (6 points)
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up to question 15