Definition of beta. 1  1 : the 2nd letter of the Greek alphabet â see alphabet table. 2  2 : beta particle. 3  3 : a measure of the risk potential of a stock or an investment portfolio expressed as a ratio of the stock's or portfolio's volatility to the volatility of the market as a whole.
Chlorine has been used as a chemical warfare agent. Sources: In nature, chlorine is only found in the combined state, most commonly with sodium as NaCl and in carnallite (KMgCl 3 â¢6H 2 O) and sylvite (KCl). The element is obtained from chlorides by electrolysis or via the action of oxidizing agents. Element Classification: Halogen. Density (g/cc): 1.56 (@ -33.6 Â°C).
Three experiments on the. removal of residual chlorine in tap water were carried out in this study as follows: 1) Chlorine removal by solar radiation (UV), 2) Chlorine removal by activated carbon. filtration, 3) Chlorine removal by aeration at various temperatures. Free chlorine concentrations greatly decreased from 1.59 to 0.09 mg/L for sample #1 (S1) and from 1.74 to 0.09 mg/L for sample #2 (S2) by the range of UV radiation of 2.85 to