The first period or row contains only elements that are gases at standard temperature and pressure.
The elements in column 18 of a wide form periodic table or Column VIII of a narrow form periodic table, commonly called the noble gases. Also, both elements in the first period, the elements in groups 15, 16, and 17 of the second period, and the element in group 17 of the third period.
The so-called noble or inert gases are in Group 18, the last group on the right of the periodic table of the elements.
Helium is part of a group called the Noble Gases. This group is made up of six different gases, their names are: Helium (H), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), and Radon (Rn).
Group 18, also called the noble gases, contains the elements that are nonreactive.
The noble gases, column 18 or VIII of a periodic table, are the least reactive. However, in the last few decades, compounds of at least the heavier members of this group have in fact been made. Therefore, there is no longer any entire group on the periodic table that is totally unreactive chemically.
The periodic table table has elements arranged in increasing order of the atomic number. NaCl is a salt derived from sodium and chloride ions. Neither ions nor compounds are listed in periodic table. The elements involved in producing the salt are sodium (period 3 group 1) and chlorine (period 3 group 17).NaCl is made up of two elements: sodium and chlorine. Sodium is present in group-1. Chlorine is present in group-17.
Noble gases can be found in group 8 on the periodic table (column farthest to the right). They have 8 valance electrons in their outer shell and therefore do not react with anything. This made it hard for scientists to discover them.
Table salt, or sodium chloride, is a compound composed of two elements: sodium (Na) and chlorine (Cl). Sodium is a metallic element found in Group 1, Period 3 of the periodic table, while chlorine is a nonmetallic element found in Group 17, Period 3 of the periodic table.
Carbon is a chemical element with the symbol C and atomic number 6. It is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds. It belongs to group 14 of the periodic table. Carbon makes up only about 0.025 percent of Earth's crust. So, yes it is.
Seaborgium is a man made chemical element, radioactive, unstable, atomic number 106, placed in the group 6 and period 7 of the periodic table of Mendeleev. Sg is a metal, solid with a formidable predicted density; it is a member of the transactinides family.
Non-reactive elements or compounds are called inert. This is a bit misleading, however - anything can be made to react given the right circumstances. The noble gases are about as close as you can get to truly inert, but even they will react under extreme conditions. >>M.T.<<
Group-18 elements least react with other elements. They are inert in nature. They are called noble gases.Elements in group 18 are less likely to react with any other elements. This group is made out of the noble gases. Its members are He, Ne, Ar, Kr, Xe and Rn.