Which element is a halogen? argon bromine calcium lithium
The Correct Answer and Explanation is:
The element that is a halogen is bromine.
Halogens are a group of elements found in Group 17 (formerly Group VIIA) of the periodic table. They are highly reactive nonmetals and include fluorine, chlorine, bromine, iodine, and astatine. These elements all share a similar electronic configuration, with seven valence electrons, which makes them very reactive, as they seek to gain one more electron to complete their outer shell and achieve a stable noble gas configuration.
Bromine, with the symbol Br, is located in Group 17 and is a halogen. It is a reddish-brown liquid at room temperature and is known for its strong oxidizing properties. Bromine is used in various applications, including flame retardants, disinfectants, and in the production of certain pharmaceuticals and agrochemicals. Its chemical reactivity is typical of halogens, as it readily forms salts called bromides when it reacts with metals.
On the other hand, argon is a noble gas and belongs to Group 18. It has a complete set of eight valence electrons and is chemically inert. Calcium is an alkaline earth metal found in Group 2, and lithium is an alkali metal from Group 1. These elements do not share the same chemical properties as halogens, as they are less reactive in their natural state compared to the highly reactive halogens.
In summary, bromine is the halogen in the list due to its position in Group 17, while argon, calcium, and lithium are not part of this group and have distinct chemical properties.
