Current local time in Crestwood, cook County, Illinois, Central Time Zone - daylight saving time change dates 2018
Gamma ray is a type of radiation that has no mass & no charge. Gamma rays have a high penetrating power. Text us. Tags: gamma ray, radiation, mass. Wednesday, February 01 2012.
This is called nuclear radiation. There are three main types of radiation: 1  alpha particles: These are small bits of nucleus. They are made of 2 protons and 2 neutrons. They have a positive electric charge.  beta particles: These are the loose electrons left over when the atoms breaks apart.