Going way out on a limb here to give the best answer I can to a poorly worded question...
I suspect the answer the person is looking for is "hydrogen."
Hydrogen is the element with unique properties that doesn't fit in any group.
Any element in group 1
Same as the group number.
The element with the most protons in Group 15 of the periodic table is bismuth with 83 protons. It is in the same group as nitrogen, phosphorus, arsenic, antimony, and moscovium, but has the highest number of protons in Group 15.
Hydrogen is the element with unique properties that doesn't fit in any group.
This group is in the p block.It is various for the element.
Elements in group VIA (6A) also called group 16.
The element hydrogen is unique in that it does not belong to any specific group on the periodic table. While it typically appears in Group 1 with the alkali metals, it also exhibits nonmetallic properties similar to Group 17 elements. This versatility makes hydrogen stand out as a distinctive element.
Radon (Rn) has the most protons of any element in Group 0 (18) with 86 protons. However, if or when Ununoctium is officially confirmed, that will become the element with most protons in that family, with 118 protons.
Helium is the element that doesn't belong in a group with any others on the periodic table. It is part of Group 18, the noble gases, which are characterized by their stable and unreactive nature.
The other elements of the actinides group.
Any element in the group 6 and period 3 (IUPAC version of periodic table).