Name:

First Biochem Quiz

  1. What is an atom?
     
  2. What is an atomic number?_____________________________________________
  3. What is mass number? ________________________________________________
  4. What are isotopes?
     
  5. Describe the number of protons and electrons in a neutral atom.__________________________
  6. Complete the table for each of the sub-atomic particles:
    Name Symbol Location Charge Mass
    Proton
     
         

     
        zero  

     
          almost nothing
  7. Draw Lewis diagrams for:
    hydrogen sodium carbon oxygen

     
     

     
     

     
     

     
     
    .
  8. Complete the following table.
    Name Chemical Formula Ball & stick model Structural formula
    water H2O
     
     
     

     
    methane CH4
     
     
     

     
    carbon dioxide CO2