Energy and Matter: Exploring the transfer and transformation of energy during radioactive decay and nuclear reactions. (Example: Understanding how energy is released in the form of radiation during ...

Radioactive decay is a spontaneous and random process. A block of radioactive material will contain many trillions of nuclei and not all nuclei are likely to decay at the same time so it is ...

It also means that the process of radioactive decay cannot be speeded up or slowed down by any physical changes such as a change of temperature or pressure. A random process means that scientists ...

Certain isotopes are unstable and undergo a process of radioactive decay, slowly and steadily transforming, molecule by molecule, into a different isotope. This rate of decay is constant for a ...

Spent sources, which can no longer be used for their intended purposes as a result of radioactive decay, are a sub-set of disused sources. If lost or not properly controlled, disused sealed sources ...

Explain that the pennies ... What do the curves suggest about the rate of radioactive decay in general? Groups can challenge each other to determine the "age" of a box containing their isotope ...

In the vast emptiness of space, Voyager 1 has been faithfully whispering its secrets back to Earth since 1977. But in a little over two decades, its nuclear-powered heart is expected to go dark. What ...