observe the modern periodic table and explain the radiation in reactivity of halogen family
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Halogen element, any of the six nonmetallic elements that constituteGroup 17 (Group VIIa) of the periodictable. The halogen elements arefluorine (F), chlorine (Cl), bromine(Br), iodine (I), astatine (At), andtennessine (Ts). They were given the name halogen, from the Greek rootshal- (“salt”) and -gen (“to produce”), because they all produce sodiumsalts 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 theigneous rocks of Earth’s crust are 0.06 fluorine, 0.031 chlorine, 0.00016 bromine, and 0.00003 iodine. Astatine and tennessine do not occur in nature, because they consist of only short-lived radioactiveisotopes.
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 theigneous rocks of Earth’s crust are 0.06 fluorine, 0.031 chlorine, 0.00016 bromine, and 0.00003 iodine. Astatine and tennessine do not occur in nature, because they consist of only short-lived radioactiveisotopes.
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