Solving Radioactive Decay: Half-Life and Decay Problems

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SUMMARY

The discussion focuses on solving radioactive decay problems, specifically using the half-life of uranium-235 (235U). The half-life of 235U is established at 700 million years. To determine the time required for a zircon sample containing 4000 atoms to decay to 125 atoms, participants emphasize the importance of applying the decay formula. Resources such as physics textbooks on radioactivity and online searches for "decay law" are recommended for further understanding.

PREREQUISITES
  • Understanding of radioactive decay concepts
  • Familiarity with the half-life calculation
  • Basic knowledge of the decay formula
  • Access to physics textbooks or online resources on radioactivity
NEXT STEPS
  • Study the radioactive decay formula in detail
  • Learn about the half-life of various isotopes, including 235U
  • Explore practical examples of decay problems in physics
  • Research online resources for interactive decay simulations
USEFUL FOR

This discussion is beneficial for students studying physics, educators teaching radioactivity concepts, and anyone looking to solve radioactive decay problems effectively.

Tedwerd
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I am confused about the half life and radioactive decay and how to figure out the problems.

here is one from my book:

A zircon sample contains 4000 atoms of the radioactive element 235U. Given that 235U has a half life of 700 million years, how long would it take to decay to 125 atoms?
 
Physics news on Phys.org
smells like homework
 
Hi,
it is simple!
Just get the formula for radioactivity..and substitute all the number that you..
tip any physics books with a topic 'radioactivity' or google 'decay law'
 

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