Summary

• Mirrors
• Refraction
• Snell's law

• Written quiz     Timer
  
  
• Atomic puzzles
  • the periodic table
    Example #1
    
  • atomic spectra
    • discrete spectral lines
    • emission vs. absorption
    
    Example #2
    Example #3
    
  
  
  
  
  
  
• Cathode rays
  • demonstration
  • experiments
    Example #4
    
  
  

 
What elements would you expect to have chemical properties similar to Calcium (Ca)?
A. Potassium (K), Scandium (Sc)
B. Sodium (Na), Yttrium (Y)
C. Magnesium (Mg), Strontium (Sr)
D. Rubidium (Rb), Aluminum (Al)
Answer














In which location would an emission spectrum be obtained?
Answer














At which location would an absorption spectrum be obtained?
Answer













How do we know that cathode rays have negative charges?
A. They are bent towards a positively charged plate.
B. They are repelled from a negatively charged plate.
C. They are bent by a magnetic field.
D. All of the above.
Answer













 



C. Magnesium (Mg), Strontium (Sr)


















 



location B


















 



location A


















 



D. All of the above.