Question

how the elements in group 8 are differnt from all other elements in periodic table​

Answer 1

Group 8 elements are also known as the noble gasses. These elements already have a full valence shell with 8 valence electrons. This leaves the elements non-reactive as they are already stable and in a low energy state.

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Answer 2

8th group or 18th group elements are called noble gases . These are the elements starting from He ( Helium) and ending at Og(Ogenesson) , they are least reactive due to their octet electronic configuration. This property makes them different from other elements of periodic table.

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