12.1 - Introduction to Radioactivity
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Practice Questions
Test your understanding with targeted questions
Who discovered radioactivity?
💡 Hint: Think about the scientist who worked with uranium.
What type of particle is emitted in alpha decay?
💡 Hint: This particle is positively charged.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What discovery did Henri Becquerel make?
💡 Hint: Think about his work with uranium.
True or False: Alpha particles are negatively charged.
💡 Hint: Recall their charge.
2 more questions available
Challenge Problems
Push your limits with advanced challenges
Given that alpha particles are stopped by paper, what materials could you use to shield yourself from beta and gamma radiation when working in a lab?
💡 Hint: Think about the densities of different materials.
If 50g of a radioactive substance has a half-life of 10 days, how much will remain after 40 days?
💡 Hint: Use the formula: remaining amount = original amount / (2^n) where n is the number of half-lives.
Get performance evaluation
Reference links
Supplementary resources to enhance your learning experience.