The periodic table is a representation of the known elements, and it includes all the elements that have been discovered and confirmed However, it is possible that there are elements beyond those listed on the periodic table that have not yet been discovered or synthesized.
The elements found in the universe are primarily formed through nuclear reactions in stars and stellar explosions, such as supernovae. These processes can produce a wide range of elements by fusing lighter elements together or through nuclear decay. The elements created in stars are then dispersed into space through stellar winds or when a star explodes. Subsequently, these elements can become part of interstellar clouds, planetary systems, and galaxies.
While the periodic table provides a comprehensive list of known elements, there could be isotopes or elements with different properties that have not been observed or identified yet. Scientists continue to explore and investigate the universe, searching for new elements or variations of known elements.
It's important to note that the search for new elements is a complex and challenging process. The discovery and confirmation of new elements require rigorous experimentation, including the synthesis and characterization of these elements under controlled conditions. The existence of undiscovered elements beyond the known periodic table is a topic of ongoing research and exploration in the field of chemistry and physics.