Understanding Isotopes, Spectra, and Kinetic Energy in Chemistry
School
Greeley West High School**We aren't endorsed by this school
Course
CHEMISTRY 1
Subject
Chemistry
Date
Dec 12, 2024
Pages
2
Uploaded by pcherry
Written Exam NAME:_____________________Per._____****************************************************************************************1. Examine the data presented in the graph below for the element Zirconium (Zr). Using your knowledge of isotopes and ability to write their nuclear symbols, explain the 5 barson the graph and write the nuclear symbols for each isotopebeing represented. (5 pts.)Answer:2. The bright light spectra for three elements and a mixture are shown in the diagram below.3. Which element(s) are contained in the mixture?
4.(4pts)A 64 g sample of germanium-66 is left undisturbed for 40 hours. At the end of thatperiod, only 2.0 g remain. Calculate the half-life of this material. (show work)A beaker contains a GASsample of a molecular substance. Both the beaker and the Gas are at194 K. The graph above represents the relationship between the temperature and time as the beaker and its contents are cooled for 12 minutes in a refrigerated chamber. 5. State what happens to the average kinetic energy of the moleculesin the sample during the first 3 minutes.6. State what happens to the average kinetic energy of the moleculesin the sample from the time interval, minute 4 to minute 9.7. What phase or phases are present from the time interval, minute 9 to minute 12?8. Identify the physical change occurring during the time interval, minute 4 to minute 9.