CHEM 1201 Final: Chem 1201 Test 3 Ch 8 Long Form
Document Summary
B = 3, c = 4, n = 5, o = 6. A bond counts for two electrons when counting for the octet rule (pg 187) For octet rule: +1 electron for each overall negative charge. = # valence electrons non-bonded electrons - # bonds. A bond counts for only one electron when counting for formal charge (pg 190) H and f are always a single bond and on the outside. Al and ga would be similar to b. Here is one exception to c having 4 bonds: Nitrogen often makes 3 bonds and has 2 non-bonding electrons. F. c. on n = 5 2 3 = 0 (know this structure) Phosphorus is directly under n in the periodic table. 3 exceptions to the octet rule: radicals when the total valence electrons is an odd number. 7 + 12 = 19: less than an octet. H, he, li, be, and b will have less than the octet rule.
