Question

1. what type of energy is gamma radiation?

fast - moving electron
high - energy electromagnetic wave
radioactive
helium nuclei

Explanation:

Gamma radiation is a form of electromagnetic radiation. Electromagnetic radiation consists of waves. Gamma rays have very high energy among electromagnetic waves. A fast - moving electron is a beta particle. Radioactive is a property (like a substance being radioactive), not a type of energy. Helium nuclei are alpha particles.

Answer:

high - energy electromagnetic wave