What are the Properties of Halogen?

Answer 1

In terms of the phase of matter in which they are normally found, the halogens are a varied group. Fluorine and chlorine are gases, iodine is a solid, and bromine is one of only two elements that exists at room temperature as a liquid. As for astatine, it is a solid too, but so highly radioactive that it is hard to know much about its properties. Despite these differences, the halogens have much in common, and not just with regard to their seven valence electrons. Indeed, they were identified as a group possessing similar characteristics long before chemists had any way of knowing about electrons, let alone electron configurations. One of the first things scientists noticed about these five elements is the fact that they tend to form salts. In everyday terminology, "salt" refers only to a few variations on the same thing table salt, sea salt, and the like. In chemistry, however, the meaning is much broader: a salt is defined as the result of bonding between an acid and a base. Many salts are formed by the bonding of a metal and a http://www.answers.com/topic/nonmetal. The halogens are all nonmetals, and tend to form salts with metals, as in the example of http://www.answers.com/topic/sodium-chloride (NaCl), a bond between chlorine, a halogen, and the metal sodium. The result, of course, is what people commonly call "salt." Due to its tendency to form salts, the first of the halogens to be isolated chlorine, in 1811 was originally named "halogen." This is a combination of the Greek words halos, or salt, and gennan, "to form or generate." In their pure form, halogens are http://www.answers.com/topic/diatomic, meaning that they exist as molecules with two atoms: F2, Cl2, and so on. When bonding with metals, they form ionic bonds, which are the strongest form of chemical bond. In the process, halogens become negatively charged ions, or anions. These are represented by the symbols F , Cl , Br , and I , as well as the names http://www.answers.com/topic/fluoride, chloride, http://www.answers.com/topic/bromide, and http://www.answers.com/topic/iodide. All of the halogens are highly reactive, and will combine directly with almost all elements. Due to this high level of reactivity, the halogens are almost never found in pure form; rather, they have to be extracted. Extraction of halogens is http://www.answers.com/topic/doubly

Answer 2

Some of The Properties of the Halogens are:

Poor Conductors of electric currents

Violent Reactions with the Alkali Metals to form salt

Never in uncombined form in nature

Answer 3

aluminum, oxygen, carbon dioxide, and nitrogen