Why are the elements of Group 18 known as noble gases?

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Solution

Group 18 elements

The group 18 elements are $h e l i u m (H e), n e o n (N e), a r g o n (A r), k r y p t o n (K r), x e n o n (X e), and r a d o n (R n)$ .

The elements present in Group 18 have their valence shell orbitals completely filled. Hence, they react with a few elements only under certain conditions. Therefore, they are known as noble gases.

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