AP Chemistry – Class 41

Dates

• Period E – Monday, November 26th
• Period F – Tuesday, November 27th

BIG QUESTION: What evidence do we have for quantization of electron levels?

ACTIVITY

• Spectrometers
• Tubes vs. Outside Light
• Observations of both?
• Compare / Contrast

INFORMATION

• Light results from re-emission from higher to lower levels
• Only certain energies allowed
• If each elements has unique set of levels then unique set of lines

ACTIVITY – HYDROGEN SPECTRUM (Lab Notebook)

• Given the energies of the first seven energy levels of hydrogen
• What are all allowed energies?
• What are wavelengths of each?
• Which are visible?
• Summarize in a table
• NOTE: instructions posted in course documents (lab folder)

TEST RETAKE

• Wednesday, November 28th @ 7:00
• 45 minutes
• 3 Questions – same topics
• I will average the scores
• Practice problems from chapter
• Look at solution online

Homework

• Finish Lab Activity (directions on the lab handout)
• NOTE – must do in lab notebook