In English, there are no inflectional prefixes. Prefixes, like all other affixes, are bound morphemes. The word prefix is itself made up of the stem fix (meaning attach, in this case), and the prefix pre- (meaning before), both of which are derived from Latin roots. prefix is an affix which is placed before the stem of a word. Adding it to the beginning of one word changes it into another word. For example, when the prefix un-is added to the word happy, it creates the word unhappy.
Gamma rays are the most dangerous. Externally, gamma radiation is dangerous because it can penetrate the body. Alpha is most dangerous if ingested. gamma if you're counting external damage, and alpha if you're counting internal. The type of radiation with the most penetrating capabilities is  gamma radiation. It is a form of ionizing radiation .
53 Radioactive Pollution OPTIONAL MODULE - 1 NotesEnvironmental Chemistry 36 RADIOACTIVE POLLUTION n the previous lesson we have discussed the harmful effects of some heavy metals andhow to reduce these effects. In this lesson we will discuss about the radiations which arethe cause of radioactive pollution.3 Radioactive Pollution OPTIONAL MODULE - 1 NotesEnvironmental Chemistry 36 RADIOACTIVE POLLUTION n the previous lesson we have discussed the harmful effects of some heavy metals andhow to reduce these effects. In this lesson we will discuss about the radiations which arethe cause of radioactive pollution.