What do all the elements in Group 8 have in common?
The outside shell has eight(8) electrons.
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In order to determine what all the elements in Group 8 have in common, we first need to identify which group Group 8 refers to in the periodic table. In this case, Group 8 refers to the group of elements known as the noble gases or Group 18, since the modern periodic table combines Groups 1 and 2.
Now, let's identify the elements in Group 18 or the noble gases. They are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). These elements have similar chemical properties and share some common characteristics.
The primary characteristic that all noble gases or Group 18 elements have in common is their full or complete outer electron shells. Each noble gas element has a stable electron configuration with a completely filled outermost electron shell, except for helium, which has only two electrons in its outer shell. This arrangement of electrons makes the noble gases extremely stable and unreactive.
The stability of their electron configurations gives noble gases low reactivity and a lack of tendency to form compounds with other elements. They are known as "inert" or "noble" gases because they rarely participate in chemical reactions.
In summary, the elements in Group 8 or the noble gases (helium, neon, argon, krypton, xenon, and radon) have a completely filled outer electron shell or a stable electron configuration. This leads to their low reactivity and explains why they are often used in lighting, lasers, and other applications requiring a non-reactive atmosphere.