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).
Chlorine in Nature. Chlorine is a highly reactive element which practically does not exist by itself in nature, but only in combination with other elements. In some rare situations, such as in human tears, free chlorine as such can be detected. It is one of the most common elements in nature, where it is even more plentiful than carbon. Among the inorganic chlorinated substances, common salt is of course the best example.