We expect an atom of Krypton (Kr) to have a larger atomic radius than an atom of Sulfur (S).

When a solid is heated to very high temperatures, it emits electromagnetic radiation known as ________________.  An example of such radiation is the burner of an electric stove top turning bright red.    

Label this question as Q-Hess on your paper. (10 min.) For this problem, you must show all your work on paper exactly as was demonstrated in the PPT lecture videos and lecture.  You must label each step of your work clearly, use correct sig figs, and circle your final answer  on your paper.  You must state your final answer for the heat of reaction (do not need to write equation) here on the exam with units.  Failure to follow these directions will result in significant to total point loss.  You must upload your work to the Canvas dropbox as directed in the exam directions. B2H6(g) + 6 Cl2(g)

  How many unpaired electrons does a ground-state atom of Arsenic, As (element 33), have?

According to modern day theory of the atom, it is possible to know exactly where the electron in an atom is located.

  Which element has the following electron configuration?  1s22s22p63s23p64s23d8  

A system initially has an internal energy U of 499 J. It undergoes a process during which it releases 109 J of heat energy to the surroundings, and does work of 401 J. What is the final energy of the system, in J? Type your final answer here.  No work needs to be submitted.  

Gamma X-rays Ultraviolet Visible Infrared Microwaves Radio waves Which has a longer wavelength, green light or ultraviolet?  

  Consider the following electron configurations.  Which one shown is not possible? A) 1s22s22p63s23p4 B) 1s22s22p53s23p4 C) 1s22s22p63s23p63d104s2 D) 1s22s22p63s33p4 E) 1s12s22p63s23p4  

There were individuals, like Thomas Paine, known as “loyalists” that opposed the Revolutionary movement.