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.

8 carbon atoms forming single bonds with 18 hydrogen atoms; a triple bond exists between the third and fourth carbon atom from the right

explanation:

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

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