Which element is known for the symbol 'Ar'?

The element known for the symbol 'Ar' is Argon. Argon is a noble gas found in Group 18 of the periodic table. It is colorless, odorless, and tasteless, making up about 1% of the Earth's atmosphere. Argon's unique properties, such as its inertness and inability to form chemical bonds under standard conditions, contribute to its applications in various industries, including welding and lighting.

The other elements listed—Bromine, Iodine, and Xenon—have their own distinct symbols and properties. Bromine is represented by the symbol 'Br,' Iodine by 'I,' and Xenon by 'Xe.' Each of these elements has different characteristics and uses in both chemical processes and applications, highlighting the importance of their respective symbols in identifying them within the periodic table.