Among the options given, the element that is in a liquid state at room temperature is: Option B: Br (Bromine) Bromine is a chemical element with the symbol Br and atomic number 35 . At room temperature (approximately 25 degrees Celsius or 77 degrees Fahrenheit), bromine is one of the only two elements on the periodic table that are in a liquid state, the other being mercury ( Hg ). Bromine is a halogen, and it appears as a reddish-brown liquid. It has a distinctive, strong smell and is known for its reactive properties. The other elements listed are: Option A: Se (Selenium) which is a nonmetal that exists in several allotropes, but the most stable and dense form is a gray metallic-looking solid. Option C: I (lodine) which is also a halogen like bromine, but iodine is a solid at room temperature. It sublimates into a purple vapor when heated. Option D: S (Sulfur) which is a yellow solid under normal conditions.