Respuesta :
Cl and Br have similar properties as they belong to halogen family.
What is halogen family?
Halogen, any of the six nonmetallic elements that constitute Group 17 (Group VII A) of the periodic table. The halogen elements are fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and (Ts). They were given the name halogen, from the Greek roots Hal- (“salt”) and -gen (“to produce”), because they all produce sodium salts of similar properties, of which sodium chloride—table salt, or halite—is best known.
Because of their great reactivity, the free halogen elements are not found in nature. In combined form, fluorine is the most abundant of the halogens in Earth’s crust. The percentages of the halogens in the igneous rocks of Earth’s crust are 0.06 fluorine, 0.031 chlorine, 0.00016 bromine, and 0.00003 iodine. At and Ts do not occur in nature, because they consist of only short-lived radioactive isotopes.
Chlorine is the best known of the halogen elements. The free element is widely used as a water-purification agent, and it is employed in a number of chemical processes. In the past ethylene dibromide was extensively used as an additive in.
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