👉 Semivulcanized is a term used in the field of chemistry to describe a type of chemical compound that contains both elements with high atomic numbers but low atomic mass. These compounds are often referred to as "semivolatile" due to their ability to remain stable at room temperature and pressure, despite their low density compared to other elements. Semivolatile substances can be categorized into two main types: those with a single atom of a particular element in the nucleus and those that have multiple atoms (