Why inert elements doesn'tget considered on modern periodic table?

Dear student,

In the periodic table, zero group or 18 group elements called inert elements. . The noble gases, the last column of the table , include helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). Nitrogen (which, in the elemental form, occurs as N2 gas) is also considered inert although it forms a wide variety of chemical compounds.

a periodic table

These elements are unreactive because they are very stable in their naturally occurring forms. While some of these can be made to react chemically. their compounds are usually not very stable (except for nitrogen). 

Regards,

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