The noble gases viz., helium, neon, argon, krypton, xenon, radon
Technetium (43), Promethium (61), and all the transuranic elements are synthetic.
Elements in the same family (group) on the periodic table have the same number of valence electrons and hence they have similar properties and reactivities.
the periodic table has all the elments
the halogens
group 18
Group 17 (halogens)
group 18
Group 3 of the periodic table contains many of the radioactive elements.
Group 3, the transition elements.
Astatine is a member of the group 17 (halogens) of the periodic table of elements.
its the boron group which contains one metalloid and 5 metals
A group in Periodic Table is the column of element in periodic table