Depending on who you ask, there are either 5 or 6 halogens.Fluorine, chlorine, bromine, iodine, and astatine definitely are halogens. Reactivity of halogens The non-metal elements in Group 7 - known as the halogens - get less reactive as you go down the group. Halogens are some of the most volatile and reactive elements found in nature. Near room temperature, the halogens span all of the physical states: Fluorine and chlorine are gases, bromine is a liquid, and iodine is a solid. Key Points. The nucleus is surrounded by electrons that move around in orbits, or levels. In fact, fluorine is the most reactive element in the halogen family, exhibiting certain properties distinct from other halogens in the same family. they exist naturally in various mineral … Halogens readily accept electrons as they are short of one electron to form an octet. As a diatomic molecule, fluorine has the ... Due to increased strength of Van der Waals forces down the group, the boiling points of halogens increase. They have relatively low melting and boiling points that increase steadily down the group. Halogens are nonmetals in group 17 (or VII) of the periodic table. Iodine and astatine are solids. Because all halogens have seven valence electrons, they are “eager” to gain one more electron. Their industrial uses far outweigh their toxic nature though. (a) Halogen is a Greek word which means salt-former’. Reactivity of halogens The non-metal elements in Group 7 - known as the halogens - get less reactive as you go down the group. Describe the physical and chemical properties of halogens. They often react with metals and non-metals to form halides. The reactivity trend of the halogens is that the higher up on the Group VIIa column the halogen is, the more reactive it is. Fluorine is the strongest oxidizing agent in the halogen family and it oxidizes other halide ions in the solution. Halogens are very reactive, the reactivity decreases from fluorine to astatine. Chemical Properties of Halogens. Cl-, Br-, etc. Therefore, the most reactive halogen is fluorine, while the least reactive, non-radioactive halogen is iodine. Fluorine and chlorine are gases, iodine is a solid, … The halogens are highly reactive in nature. Down the group, atom size increases. At room temperature, fluorine and chlorine are gases and bromine is a liquid.

Halogens are nonmetals. The characteristics of halogens are similar across the chemical series, although a progressive change in the properties is observed from fluorine through chlorine, bromine, iodine to astatine. However, halogens readily combine with most elements and are never seen uncombined in nature. It can be seen that there is a regular increase in many of the properties of the halogens proceeding down group 17 from fluorine to iodine. This includes their melting points, boiling points, intensity of their color, the radius of the corresponding halide …

Physical and Chemical Properties of Group 17 Elements Group 17 Elements: The Halogens The elements in Group 17 are: Fluorine Chlorine Bromine Iodine Astatine These elements are known as halogens.