Elemental mercury, also known as metallic mercury, is a silvery-white liquid metal at room temperature. It is unique among metals because it remains in liquid form, making it useful in various applications, such as thermometers and barometers. Mercury is a heavy metal and is toxic, posing health risks if inhaled or ingested. In nature, elemental mercury can be found in mineral deposits and is often released into the environment through human activities, such as mining and industrial processes. Due to its toxicity, exposure to mercury can lead to serious health issues, including damage to the nervous system and kidneys. Proper handling and disposal are essential to minimize risks associated with mercury contamination.