CHM 11500 Lecture Notes - Lecture 6: Beta Particle, Tap Water, Nuclear Power
7 Sep 2018
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Chm 115 lecture 6 # - radioactivity. More clothing is enough to stop external radiation from particles like alpha and beta. Physical contact from radioactive substance require lot more material and protection to stop the rays from entering and damaging the body. Common sources of external radiation : cosmic rays, radiation from ground, radiation from air. Man made sources of radiation: x rays, therapeutic radioactive treatment, jet plane emissions, working around nuclear power plants. E- energy (j), m- mass (kg), c- speed of light. Where speed of light is 2. 99 x 10^8 m/s. 12c - atom -> 6 protons + 6 neutrons + 6 e (-ve charge) Understanding the relation between carbon and hydrogen atom- Change in e= change in mass x speed of light2. = 8. 89 x102 j/mol or 8. 89 x 109 kj/mol (massive energy release) This is the energy that is released when a carbon atom is formed and is also called the nuclear binding.
