Spectral Analysis - Solution

1. What wavelengths are found in the hydrogen spectrum?
   4100, 4350, 4850, and 6550

2. Does hydrogen occur in star A?
   YES

3. Does hydrogen occur in star B?
   YES

4. What is the atmospheric composition of star A?
   HELIUM, HYDROGEN, and SODIUM

5. What is the atmospheric composition of star B?
   HELIUM, HYDROGEN, and MERCURY

6. Which element(s) does not occur in the atmosphere of either star?
   CALCIUM and STRONTIUM