Which group of elements in modern periodic table were missing from newlands periodic table?

In Newlands' Periodic Table, the group of noble gases was missing. This is because noble gases, such as helium, neon, argon, krypton, xenon, and radon, were not discovered until after Newlands proposed his arrangement in the 1860s. As a result, he was unable to account for their unique properties and their placement in the periodic table.