Final answer:
Elements with atomic numbers above 92 are known as transuranium elements. These are synthetic and tend to be highly unstable; they are usually part of the actinide series and extend up to element 118.
Step-by-step explanation:
Elements with atomic numbers greater than 92 are referred to as transuranium elements. The currently known transuranium elements range up to element 118. These elements have been produced synthetically and are recognized by the International Union of Pure and Applied Chemistry (IUPAC). Several characteristics of these elements include their instability, resulting in very short lifespans, and most of them are part of the actinide series, which spans atomic numbers 89 through 103. The pursuit of creating new elements continues, and scientists are exploring the potential island of stability where it is supposed that elements with higher atomic numbers may have longer lifespans.