5. Find the sum of all the valence electrons for NF, (Add how many valence electrons one nitrogen atom has with the
valence electron for three fluorine atoms.)
6. How many valence electrons are in the drawing of NF, above?
7. In CCL, carbon is the "central atom". In NF3 nitrogen is the "central atom". What is meant by "central atom"?
8. In SF₂ sulfur is the central atom. You can tell which atom is the central atom simply by looking at the formula.
What is meant by "central atom"?
9. Identify the central atom in each of the following molecules:
a. CO₂
b. PH3
c. SiO₂
