Groups 15, 16 and 17.
Group 3 of the periodic table contains many of the radioactive elements.
The noble gases in Group 18 contain elements that are all gases at standard temperature and pressure (STP). Therefore, the period that contains the most elements that are all gases at STP is the third period.
Group 16 of the periodic table of the elements (chalcogens elements)
Periodic table consists of elements not cations. However group 1 and group 2 elements (left side of the periodic table) are elements which will form cations easily.
Noble gases are nonreactive gaseous elements that are located in group 18 of the periodic table. They are characterized by having a full valence shell of electrons, making them stable and unreactive under normal conditions.
Gaseous elements are typically found on the right side of the periodic table, in the nonmetals group.
Periodic Group 18(0) has all gaseous elements in it, commonly known as the noble, or inert gases.
Group 3, the transition elements.
Noble Gases, Group 8A
Group 3 of the periodic table contains many of the radioactive elements.
The noble gases in Group 18 contain elements that are all gases at standard temperature and pressure (STP). Therefore, the period that contains the most elements that are all gases at STP is the third period.
Group 16 of the periodic table of the elements (chalcogens elements)
Astatine is a member of the group 17 (halogens) of the periodic table of elements.
Group 3 through Group 13
Group 18, otherwise known as the noble gases.
Group 16 on the Periodic Table, also known as the chalcogens, contains elements that react with oxygen to form compounds with the general formula X2O. The elements in this group include oxygen, sulfur, selenium, tellurium, and polonium.
In the Periodic Table of the Elements, a column (group) contains all elements that exist with the group number of electrons in the outer energy level of an atom of that element.