Any of the six nonmetallic elements that make up Group 17 (Group VIIa) of the periodic table are referred to as halogen. Fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and tennessine (Ts) are the halogen elements . They were given the name halogen, which comes from the Greek roots hal- (“salt”) and -gen (“to produce”), since they all produce sodium salts with comparable properties, the most well-known of which is sodium chloride, also known as table salt or halite.

The free halogen elements are not found in nature due to their high reactivity. In its mixed form, fluorine is the most common halogen in the Earth’s crust.. 0.06 fluorine, 0.031 chlorine, 0.00016 bromine, and 0.00003 iodine are the percentages of halogens found in Earth’s crust igneous rocks. Because they are made up of only short-lived radioactive isotopes, astatine and tennessine do not exist in nature.

In terms of their overall chemical behaviour and the features of their compounds with other elements, the halogen elements are strikingly similar. However, the characteristics of fluorine, chlorine, bromine, and iodine gradually change to astatine, with the difference between two consecutive elements being most obvious with fluorine and chlorine. Fluorine is the most reactive of the halogens, and indeed of all elements, with a variety of distinguishing features.

Halogens Elements

There are either 5 or 6 halogens, depending on who you ask.Fluorine, chlorine, bromine, iodine, and astatine are all halogens.Tennessine, element 117, may have properties that are similar to those of the other elements. Despite being in the same column or group as the other halogens in the periodic table, most scientists believe element 117 behaves more like a metalloid. Because so little of it has been created, it’s a matter of guesswork rather than empirical evidence.

Fluorine

Chlorine

Bromine

Iodine

Astatine

Tennessee is a state in the United States (might behave as a halogen, at least in some respects)

Fluorine 

Fluorine (F), the most reactive chemical element and the lightest member of the halogen elements, is found in Group 17 (Group VIIa) of the periodic table.Its chemical activity is due to its exceptional capacity to attract electrons (it is the most electronegative element) and the small size of its atoms.

Uses

• Fluoride salts, often known as fluorides, have long been employed in welding and glass frosting.
• The element is used to generate uranium hexafluoride, which is utilised in nuclear power plants to separate isotopes of uranium.
• Fluorine is utilised in a variety of fluorochemicals, such as solvents and high-temperature polymers like Teflon (poly(tetrafluoroethene), PTFE).
• CFCs (chlorofluorocarbons) were originally utilised as propellants for aerosols, as refrigerants, and for ‘blowing’ expanded polystyrene.

What is chlorine?

On a hot summer day, there’s nothing like the smell of swimming. The sun screen, the plastic floating tubes, and the chlorine pool, of course. To almost everyone, the smell is instantly recognisable. For some, this is how summer smells. It’s something they look forward to all year. Others are put off by the odour of dirty water and will only drink bottled, non-chlorinated water. Whatever comes to mind when you think of chlorine, it is clear that it plays an important role in our life. Its primary use is as a disinfectant in a variety of industries.

Uses

• Chlorine is a disinfectant that kills bacteria. It’s used to purify water for drinking and swimming pools. I
• PVC is made with about 20% of the chlorine generated.
• Organic chemistry is another important application for chlorine. It’s used as an oxidising agent and in substitution operations.
• Chlorine was once widely employed to manufacture anaesthetics like chloroform and carbon tetrachloride (a dry-cleaning solvent).

What is Bromine?

At room temperature, it is a fuming red-brown liquid, making it the third-largest halogen.Two chemists independently discovered bromine.

Uses

• Bromine is employed in a wide range of applications, including agricultural chemicals, dyes, pesticides, medicines, and chemical intermediates.
• Bromine compounds can be used to make flame retardants.
• Halon fire extinguishers, which are used to put out fires in museums, planes, and tanks, contain organic bromides. In film photography, silver bromide is a chemical.
• Bromine was used to make 1,2-di-bromoethane, an anti-knock agent, before leaded fuels were phased out.

What is Iodine?

Iodine is a chemical element with the atomic number 53 and the symbol I.. It is a semi-lustrous, non-metallic solid that melts to form a deep violet liquid at 114 degrees Celsius and boils to form a violet gas at 184 degrees Celsius under normal conditions.

Uses

• After Louis Daguerre created a process for creating images on a piece of metal in 1839, photography became the first commercial use for iodine. Daguerreotypes were the name for these photographs.
• Iodine has a wide range of commercial applications nowadays. Pharmaceuticals and disinfectants, printing inks and dyes, catalysts, animal feed supplements, and photography chemicals all use iodide salts.
• Iodide is added to table salt in tiny doses to prevent iodine deficiency from damaging the thyroid gland.

Conclusion

The employment of halogen elements is really beneficial. They can be used for a wide range of purposes. Chlorine is a chemical that is used to clean water. Furthermore, chlorine is found in table salt (sodium chloride), one of the most extensively used chemical molecules. Fluoride is a chemical that is added to drinking water to prevent tooth decay.