Why pH Measurements Are Important. Chemicals reactions in water are affected by the acidity or alkalinity of the solution. This is important not only in the chemistry lab, but in industry, cooking, and medicine. pH is carefully regulated in human cells and blood. The normal pH range for blood is between 7.35 and 7.45.
The radiation one typically encounters is one of four types: alpha radiation, beta radiation, gamma radiation, and x radiation. Neutron radiation is also encountered in nuclear power plants and high-altitude flight and emitted from some industrial radioactive sources. Alpha Radiation. 2  Alpha radiation is a heavy, very short-range particle and is actually an ejected helium nucleus. 3  Some characteristics of alpha radiation are: 4  Examples of some alpha emitters: radium, radon, uranium, thorium.
ORIGIN OF RADON. - released by radioactive decay of radium-226 (T 1/2 = 1620 years). - radium-226 is produced though the radioactive decay of uranium-238. - uranium-238 (T 1/2 = 4.51 billion yrs) comprises 4 ppm of the earths crust. - radon-222 is a non-reactive noble gas and itself is not a health hazard.PHYSICAL CHARACTERISTICS OF RADON. - an odorless, tasteless, invisible gas that mixes with air. radium-226 is produced though the radioactive decay of uranium-238. - uranium-238 (T 1/2 = 4.51 billion yrs) comprises 4 ppm of the earths crust. - radon-222 is a non-reactive noble gas and itself is not a health hazard. PHYSICAL CHARACTERISTICS OF RADON. - an odorless, tasteless, invisible gas that mixes with air.