CHEM 110
                 Answers to Eighth Take Home Quiz

1. Write electronic configurations for the following atoms and
   ions.

    F-          1s22s22p6

    Ne            1s22s22p6

    Na+         1s22s22p6

2.  A) How many valence electrons does an atom of oxygen have ?

                                6

    B) What is the valence of oxygen ?

                                2

3. Which one of the following types of electromagnetic radiation
   consists of the longest wavelength radiation ?

    Green light                 Gamma
    UV                          Infrared (IR)
    Radio                       X-rays
    Microwave

                             RADIO

    Which one has the highest frequency radiation ?

                             GAMMA

    Which one consists of photons having the greatest energy ?

                             GAMMA


4. When an electron in a sublevel of an excited atom drops into a
sublevel of lower energy, how many photons of light are emitted ?


                              one

5. Which of the following electron configurations of atoms
correspond to excited states rather than ground states ?

        O       1s22s22p33s1             excited

        Na      1s22s22p63s1             ground

        Na      1s22s22p63p1             excited