What is the color and physical state of bromine at room temperature?

Bromine is a diatomic molecule that exists as a liquid at room temperature, typically observed as an orange-brown color. This unique characteristic is important as it distinguishes bromine from many other elements. It is one of the few elements that is liquid at room temperature, making it notable in the periodic table alongside mercury. The distinct color comes from the absorption of certain wavelengths of light by the bromine molecules, which gives it its characteristic hue. Understanding the properties of bromine helps in various applications, including its use in flame retardants, pharmaceuticals, and agricultural chemicals. Recognizing bromine's physical state and color is crucial for identifying it among other elements and compounds.