21. Nuclear Chemistry
Rate of Radioactive Decay
Get help from an AI Tutor
Ask a question to get started.
4:31 minutes
Problem 35
Textbook Question
Textbook QuestionSome watch dials are coated with a phosphor, like ZnS, and a polymer in which some of the 1H atoms have been replaced by 3H atoms, tritium. The phosphor emits light when struck by the beta particle from the tritium decay, causing the dials to glow in the dark. The half-life of tritium is 12.3 yr. If the light given off is assumed to be directly proportional to the amount of tritium, by how much will a dial be dimmed in a watch that is 50 yr old?
Verified Solution
This video solution was recommended by our tutors as helpful for the problem above
Video duration:
4mPlay a video:
676
views
Was this helpful?
Related Videos
Related Practice
Showing 1 of 8 videos