TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: Radioactivity is the release of particles and/or energy from the nucleus of an atom.

SOLUTION: What is the release of particles and/or energy from the nucleus of an atom described as?

PROBLEM: Demagnetization is the process in which a magnet loses its magnetic properties.

SOLUTION: What is the process called in which a magnet loses its magnetic properties?

PROBLEM: Alkenes with the same atoms but different shapes are called isomers.

SOLUTION:
Alkenes with the same atoms but different shapes are called what?