False. It is a fluid as it is in its liquid state possessing qualities of a liquid just that it is viscious
According to the report of US Environmental Protection
Agency, majority of large dose radiation exposure comes from natural background
radiation sources particularly the radioactive gases radon and thoron. This two
gases form when naturally occurring elements decay. However in the case of
man-made sources, the largest dose comes from medical x-rays.
(1) activation energy of the reaction to decrease.
