Chapter 7-Pop Quiz -- On Your Own Paper!!
1. T or F. Ultraviolet light is not visible to us because it has a frequency which is too
low to be visible. (If false, explain why)
2. T or F. The speed with which electromagnetic radiation moves through the air is
dependent upon its wavelength. (If false, explain why)
3. A gold atom will lose an electron if it is bombarded with an energy of 1.48 x 10-21
kJ. Is a photon of light with a wavelength of 225 nm capable of removing an
electron from a gold atom?
4. Briefly explain how “neon” lights emit light. (i.e. what is going on with the
electrons??)
5. Draw an orbital diagram for Sulfur. Give a full set of four quantum numbers for
each of the electrons in the 3rd energy level for the Sulfur atom.
6. Write the shorthand electron configurations for the following elements Co, Te,
Dy.
7. For each of the elements listed in Number 6, complete the following.
a) How many unpaired electrons are present in each atom?
b) Give the 4 quantum numbers of the “final” electron in each.
c) In what block of the Periodic Table does each reside?
8. Quickly explain why one could argue that He should be placed right next to H on
the Periodic Table?
9. For a given atom, what is the greatest number of quantum numbers any 2
electrons can share in common? Whose principle is this?
10. How many electrons does a sulfur atom gain when forming an ion? How many
electrons does a Calcium atom lose when forming an ion? Write the shorthand
electron configurations for each of these ions (Sulfur ion and Calcium ion).
Why can these two ions be described as isoelectronic?
11. Extra Credit: Which ion do you think has a smaller radius, a Sulfur ion or a
Calcium ion?