Radioactivity and Radioactive Decay

Start with the atom

The mind map “Atoms and Radiation” is a starting point for this page. It outlines atomic structure and the relative mass and charge of protons, neutrons and electrons. Use it to get familiar with the particles before moving on to the mind maps that focus on radiation.

Among the mind maps titled “Radioactivity”, one connects particles in an atom and an unstable nucleus with alpha, beta and gamma radiation. Another covers radioactive emissions and unstable isotopes. Their excerpts can help you tell them apart.

Build your vocabulary

After looking at the maps, use the flashcard deck that asks for definitions of ionizing radiation, a cloud chamber, alpha, beta and gamma radiation, parent and daughter nuclei, and half-life. Try answering each prompt before checking the card.

Another flashcard deck asks about the total number of protons and neutrons and the effect of magnetic and electric fields on alpha, beta and gamma rays. It offers a way to practice alongside the maps rather than reading the same material in one format.

Use the quiz with a map

The page also lists a quiz. Check its questions to see how they fit what you are studying, then use a relevant mind map as a reference while going over the material. You can return to the flashcards to practice terms that need more attention.

For a question-led map, “What is radioactivity?” includes a prompt about identifying an alpha particle and writing its symbol with atomic and mass numbers.

Connect the topic to the unit

Radioactivity and Radioactive Decay is a section of the Atomic Structure unit in Physics. The listed resources connect the structure of an atom with unstable nuclei and radiation, so you can move between the particle overview and the topic-specific maps as you study.

Choose a map and pair it with a flashcard deck for your next study session.