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).
Interesting Facts about Chlorine. 1  Chlorine gas was used by the Germans in WWI to poison the Allied soldiers. 2  Around 1.9% of the ocean's mass is composed of chlorine atoms. 3  It has a high density for a gas of 3.21 grams per liter (air is around 1.29 grams per liter). 4  Chlorine is used to make chlorofluorocarbons or CFCs.