Non-Hodgkin lymphoma is broadly divided into two major groups: B-cell lymphomas (which develop from abnormal B-lymphocytes, which is most common), and T-cell lymphomas (which develop from abnormal T-lymphocytes). Lymphocytes are a type of white blood cell that helps the body fight infections.
The atomic number of radon (Rn) is 86 and the atomic weight of Rn is 222 grams/mole.
Two other isotopes of radon occur in nature; radon-220, which occurs in the. thorium-232 decay chain (table 2) and radon-219 in the uranium-235 chain. (table 3). Both these isotopes have half-lives of under a minute and are less. important than radon-222 which is the subject of the rest of this essay.