4. Draw the electron dot structures for the following compounds: a. O3
b. CNCl
c. CH5N
d. XeI4

5. Draw two resonance forms for nitrosyl chloride, ONCl. Which one is better and why?

6. Draw out the expanded version of the molecule with the condensed formula HCCCH2OH. What is the hybridization of each carbon?

7. Use hybridization to explain why carbon can only form four bonds.

Answerstudying coal cumbustion as an energy source;

Radon-222 or rn-222 has a half-life of 3.82 days. to determine the fraction of an original sample of rn-222 that remains unchanged after 7.646 days, we calculate the amount of rn-222 remaining after 7.646 days and divide it with the original amount. using 1 gram as a basis and using half-life calculation methods, we can determine that  0.249 or 0.25  grams of rn-222 will remain, and thus the fraction remaining is 0.25 or 1/4.