In the current periodic table, elements are typically arranged in order of increasing atomic number. If an element with atomic number 120 or more were discovered before element 119, it would be placed in the periodic table according to its atomic number. The periodic table would need to be expanded to accommodate the new element.
The current periodic table has a standard layout, with elements arranged in periods (rows) and groups (columns) based on their electronic configurations and chemical properties. As new elements are discovered and verified, they are assigned a temporary systematic element name (such as ununennium for element 119) and a placeholder location in the periodic table. Once their discovery is confirmed, their official names and positions in the periodic table are determined by the International Union of Pure and Applied Chemistry (IUPAC) and the International Union of Pure and Applied Physics (IUPAP).
If an element with atomic number 120 or higher were discovered before element 119, it would be placed in the appropriate position in the periodic table, following the established principles of element organization based on atomic number.