^{4}\textrm{He}\) When a radioactive atom emits an alpha particle the mass number decreases by four and the atomic number drops by two. Here is the equation for the alpha decay of radon-219 into ...

and is responsible for a certain kind of radioactive decay), and the strong nuclear force (which holds together the protons and neutrons in atomic nuclei, and is therefore crucial to the stability ...

half life and nuclear equations. If you struggled with the quiz, don't panic - we've got you! You can revise radioactive decay by clicking the links below. Click the links below to try our GCSE ...