Chemistry 2090 October 10, 2008 Please hand in the following problems, at the end of class on October 17. In addition, attach the answers to the following questions found in our text: Chapter 9: 40, 58, 68 Chapter 10: 30, 32, 40, 52 1. Atoms X, Y and Z are found in the same period of the periodic table, and have 2, 6 and 7 valence electrons, respectively. (a) Write the formula for the compound most probably formed between X and Z; is their bond primarily ionic, or covalent? (b) Write the formula for the compound most probably formed between Y and Z. 2. Classify as paramagnetic or diamagnetic each of the following species, as found in their ground state: He, Be, C, Na, Na + . 3. (a) Without consulting any reference materials, compare 4 Be and 3 Li. Estimate for each of the electrons found in the ground state of the neutral molecule the Z ef which is active; answers of the form “between 3.4 and 3.7” would provide the appropriate level of approximation. Suggest which electron(s) of the 7 listed would have lowest ionization energies; if you list
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