The Periodic Table is complete for all known elements and has no gaps that could be filled with unknown elements.
However the periodic table is inherently open ended, additional radioactive elements can in principle always be added beyond the most massive known element if we create them in particle accelerators (such elements may have also been created in the initial moments of supernova explosions). However all of these new elements are very difficult to create and even more difficult to detect and verify once created as they decay back to known lighter elements almost instantly.
A Periodic table The Periodic Table of the Elements.
Noble gasses
group 18, noble gases
true
To complete their octet
A complete periodic table arranged in periods and groups. The symbol of element and atomic number are mentioned.
yea why
yes it did
A Periodic table The Periodic Table of the Elements.
atomic number
Noble gasses
i think in 1860's or something
group 18, noble gases
TRUE
true
A group in Periodic Table is the column of element in periodic table
It is called the Periodic Table of Elements.