Question

Lab Investigation

In a lab, there is an unknown gas leaking. By following the steps below, you will help the company identify the gas leaking into the lab:

Step 1: Right-click to open the Emission Spectra Activity in a new tab. You may lose progress on this page if you do not right-click the link! Link:

Step 2: Read each slide in the Emission Spectra Activity and then click the Continue button at the bottom of the page.

Step 3: On the last slide, click the Emission Spectra button at the bottom of the screen.

Step 4: Read the slide and then click Learn More.

Step 5: Click on the circle for Hydrogen (H), which should turn dark blue. Then click on View Data.

Step 6: Fill in the data table below with the element symbol, atomic number, the lowest wavelength present in the spectrum (in nanometers), the highest wavelength in the spectrum (in nanometers), and the total number of lines in the spectrum for Hydrogen (H) based on the information shared in the activity. Ignore the pop-up keyboard that appears when you select a box and instead type using your keyboard.

Step 7: Click reset and then select the next element from your data table, Helium (He).

Step 8: Continue to fill in the data table below. Watch for any patterns in the spectra. For example, is there any correlation between an element’s atomic number and the lowest or highest wavelength in its spectrum? Do larger elements consistently have more spectral lines?

⭐ Hint: See the example of H data below ⭐



Element Name Element Symbol Atomic Number Lowest Wavelength in Spectrum (nm) Highest Wavelength in Spectrum (nm) Total Number of Spectral Lines
Hydrogen H 1 410 nm 656 nm 4 lines
Question 1
10. Complete the data table as instructed above. (3 points)
Element Name Element Symbol Atomic Number Lowest Wavelength in Spectrum (nm) Highest Wavelength in Spectrum (nm) Total Number of Spectral Lines
Hydrogen




Helium




Carbon




Oxygen




Neon




Sodium

Answer 1

I can’t open the Emission Spectra Activity from here, so I can’t read the exact numbers the activity shows. Do you want me to:

A) Wait for you to paste or type the numbers you see in the activity and then I’ll fill the table, or
B) Fill the table now using typical (literature) visible-emission values for these elements and clearly mark them as approximate?

If you pick B, I can provide an estimated table right away (I’ll mark it “approximate — may differ from the activity”). Which would you prefer?