CHEM 120 Quiz 1 Q and A

Grading Summary
These are the automatically computed results of your exam. Grades for essay questions, and comments from your instructor, are in the "Details" section below.    
Date Taken:    7/12/2015
Time Spent:    38 min , 01 secs
Points Received:    36 / 40  (90%)
Question Type:    # Of Questions:    # Correct:
Multiple Choice    7    6
Short    5    N/A
Essay    1    N/A
Grade Details - All Questions
Question 1.    Question :    
(TCO 2) The atomic number of an atom is equal to the number of

     Student Answer:    
         CORRECT     protons.
          
     Instructor Explanation:    See Chapter 3; the atomic number = number of protons.
     Points Received:    2 of 2
     Comments:    

Question 2.    Question :    
(TCO 2) Consider a neutral atom with 30 protons and 34 neutrons. The number of electrons in this atom is

     Student Answer:        
         CORRECT     30. 
     Instructor Explanation:    See Chapter 3. In a neutral atom, the number of protons equals the number of electrons. Therefore, the number of electrons in this instance is 30.
     Points Received:    2 of 2
     Comments:    

Question 3.    Question :    
(TCO 2) Heptane is always composed of 84% carbon and 16% hydrogen. This illustrates the law of

     Student Answer:    
CORRECT     definite proportions.
              
     Instructor Explanation:    See Chapter 2.
     Points Received:    2 of 2
     Comments: