Which element has the highest atomic number in the periodic table?

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Periodic table of the elements with color-coded categories and labeled element groups, showing atomic numbers, symbols, and basic information for each chemical element. — periodic table Modern version of the periodic table of the elements. To learn an element's name, atomic number, electron configuration, atomic weight, and more, select one from the table.

The element with the highest atomic number in the periodic table is oganesson, which has an atomic number of 118.12

As a synthetic transuranium element, oganesson is a member of the noble gases group. It is highly radioactive and exists for only a fraction of a millisecond, which has limited the ability of scientists to determine its physical and chemical properties through direct experimentation. Because it can only be produced in particle accelerators, it currently has no practical applications outside of scientific research.1