Bohr Model Activity 2023

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Dec 6, 2023

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Name Date __________Pd___ Honors Chemistry – Unit 4 Activity Atomic Emission and Bohr’s Contribution to Atomic Theory Exploration Part 1: Look at the lights in the room or an incandescent light bulb through the spectrophotometer or diffraction grating. 1. What do you notice about the incandescent light bulb as seen with the “naked eye,” and observations using the spectroscope or diffraction grating? a. Observations – eyes only: b. Observations – spectrophotometer/diffraction grating: c. Using colored pencils, draw what you see from the incandescent light bulb through the spectroscope or diffraction grating. R O Y G B I V Part 2: Your instructor will show gas tubes filled with hydrogen gas (hydrogen spectral tube) and a second gas spectral tub in power supplies. The power source runs an electrical current through the tube at a high voltage. Make observations of the spectral tubes with your eyes only and then through the spectrophotometer or diffraction grating. 2. What do you notice about the tube of hydrogen gas as seen with the “naked eye,” and observations using the spectrophotometer or diffraction grating? a. Observations – eyes only: b. Observations – spectrophotometer/diffraction grating: c. Using colored pencils, draw what you see from the hydrogen gas through the spectrophotometer or diffraction grating:
R O Y G B I V 3. What do you notice about the tube of gas as seen with the “naked eye,” and observations using the spectrophotometer or diffraction grating? a. Observations – eyes only: b. Observations – spectrophotometer/diffraction grating: c. Using colored pencils, draw what you see from the hydrogen gas through the spectrophotometer or diffraction grating: R O Y G B I V Comprehension Check: 4. Compare and contrast your observations of the incandescent light with your observations of the spectral tubes. 5. Which subatomic particle do you think is affected when energy is added to the atom? Explain. 6. What do you think happens to this subatomic particle when it absorbs energy? 7. What do you think happens to this subatomic particle when it releases energy? Where does this energy go?
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