University:
University of California, Berkeley
Course:
PHYSICS 5A | Introductory Mechanics and Relativity
Academic year:

2024
Views:

187

Pages:

1
Author:

n2d3u4itnng

Lab: Half-Life Model 1. Which statements describe isotopes? Check all that apply.: 1, 4, & 5 Isotopes of the same element have the same number of protons. Some isotopes are unstable. Isotopes are identified by their mass number. 2. In this lab you will use a simulation to explore the process of radioactive decay. You will examine how long it takes for an isotope to decay. In the space below, write a scientific question that you will answer by doing this experiment.: How does the number of radioactive atoms change over time? 3. Which statements describe half-life? Check all that apply.: 1, 3, & 6 Each isotope has a half-life that is different from the half-life of other isotopes. The half-life of an isotope changes constantly. An isotope's half-life is not affected by temperature, pressure, density, or concentration. 4. Use the drop-down menus to complete each sentence. The number of half-lives changes. This is the variable. The number of radioactive atoms changes due to the number of half-lives. The number of radioactive atoms is therefore the variable.: independent dependent 5. Write a hypothesis about how the number of half-lives affects the number of radioactive atoms. Use the "if . . . then . . . because . . ." format and be sure to answer the lesson question: "How does the number of radioactive atoms change over time?": If the number of half-lives increases, then the number of radioactive atoms decreases, because approximately half of the atoms' nuclei decay with each half-life. 6. Which statements are part of the safety protocol for this lab experiment? Check all that apply.: 2, 3, & 5 Use caution when shaking the box so that pennies do not fall on the floor. Always wear safety googles when performing an experiment. Report all accidents to the teacher. 1/1