Semi-metallic materials possess properties that are intermediate between metals and non-metals. They can conduct electricity, though not as efficiently as metals, and often exhibit some degree of metallic luster. This unique combination of characteristics makes them useful in various applications, such as in electronics and semiconductors. Common examples of semi-metals include arsenic, antimony, and bismuth. These elements can be found in the periodic table and are often used in alloys or as doping agents in silicon to enhance its electrical properties. Their versatility makes them important in modern technology.