A few short questions here and a few videos to watch. Specification page 40
- Copy and complete: Radioactive decay is _____________.
- Copy and complete this paragraph: The half-life of a radioactive isotope is the time it takes for the number of __________ of the isotope in a _________________, or the time it takes for the count rate (or activity) from a sample containing the isotope to fall to half its ________________.
- Watch these videos which tell you how to calculate half-life. https://www.youtube.com/watch?v=zXw2cOSBB8E and https://www.youtube.com/watch?v=wj9BzGFao8k&t=1s.