📚 Topic Summary
The half-life of a radioactive material is the time it takes for half of the atoms in a sample to decay. This decay process is random and follows exponential decay. In this lab activity, you'll explore how to determine the half-life of a simulated radioactive substance, understand the concept of exponential decay, and apply this knowledge to real-world scenarios.
Understanding half-life is crucial in various fields, including medicine (radioactive tracers), archaeology (carbon dating), and nuclear physics. By performing this activity, you'll gain a practical understanding of this fundamental concept. Let's get started! ☢️
🧪 Part A: Vocabulary
Match the terms with their definitions:
| Term |
Definition |
| 1. Half-life |
A. The process by which an unstable atomic nucleus loses energy by emitting radiation. |
| 2. Radioactive Decay |
B. An atom with an unstable nucleus that emits radiation. |
| 3. Isotope |
C. The time required for one-half of the atoms of a radioactive substance to decay. |
| 4. Parent Nucleus |
D. Atoms with the same number of protons but different numbers of neutrons. |
| 5. Daughter Nucleus |
E. The original nucleus before radioactive decay. F. The nucleus remaining after radioactive decay. |
Answers: 1-C, 2-A, 3-D, 4-E, 5-F
📝 Part B: Fill in the Blanks
Complete the following paragraph with the correct terms:
__________ decay is a random process where an unstable __________ emits particles or energy. The __________ is the time it takes for half of the radioactive atoms to decay. After one half-life, only __________ of the original sample remains. This process continues until a stable __________ is formed.
Answers: Radioactive, isotope, half-life, half, nucleus
🤔 Part C: Critical Thinking
Explain how the concept of half-life is used in carbon dating to determine the age of ancient artifacts. Provide a detailed explanation of the process and its limitations.