Practice problem
Isotopes — Definition & Overview
By Deena Hauze
Plutonium-238 is a radioactive isotope used for electrical power in spacecraft. Heat is produced by the decay of the radioactive isotope and converted into electricity.
An astronaut fueling up the SNAP 27 spacecraft
Image source: By Charles Conrad Jr. [Public domain], via Wikimedia Commons
Which of the following properties of radioactive isotopes show how they can be used a fuel?