Which of the following elements has the symbol 'Kr'?

The symbol 'Kr' stands for Krypton, which is a noble gas found in Group 18 of the periodic table. Krypton is a colorless, odorless gas that is used in various applications, including lighting and photography. It is known for its inert properties, meaning it does not easily react with other elements. Identifying chemical symbols is a fundamental aspect of understanding the periodic table and elemental properties, making this knowledge crucial for scientific studies. The other elements listed have distinct symbols that do not align with 'Kr'; for example, Argon is represented by 'Ar', Helium by 'He', and Bromine by 'Br'. This understanding of elemental symbols is essential for effective communication in chemistry and related fields.