What is more dangerous: gamma, alpha, beta or X ray?

It depends.” First, let's be clear about something: gamma and x-rays differ only in how they are produced. Once produced, all else equal, they are indistinguishable. Gamma occurs from radioactive decay and varies in strength. read more

X rays , Gamma rays = 1. beta= 1. alpha = 20. This makes it look like alpha is the worst- but it ignores the fact that the alpha may not reach you through the air, penetrate your clothes or dead skin. If it does - it is nasty. The others look to be comparatively tame - but being shielded form them (x rays and gamma) is not so easy. read more

Once ingested alpha radiation (of the same amounts in decays per seconds and energy) is more damaging that either gamma or beta radiation because of the very substantial charge on the particle. The result is that it more easily ionizes and damages biological material once it is in your body. read more

Ionizing radiation comes in three flavors: alpha particles, beta particles and gamma rays. Alpha particles are the least dangerous in terms of external exposure. Each particle contains a pair of neutrons and a pair of protons. read more