EVERYDAY SCIENCE

Detailed explanation-1: -Group 8A (or VIIIA) of the periodic table are the noble gases or inert gases: helium (He), neon (Ne), argon (Ar), krypton (Kr ), xenon (Xe), and radon (Rn).

Detailed explanation-2: -Because they’re reluctant to share electrons from their filled outer electron shells, noble gases are generally considered unreactive.

Detailed explanation-3: -Noble gases are nonreactive, nonmetallic elements in group 18 of the periodic table. Noble gases are the least reactive of all elements. That’s because they have eight valence electrons, which fill their outer energy level.

Detailed explanation-4: -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.

Detailed explanation-5: -Group 18: The Noble Gases Because the noble gases are composed of only single atoms, they are called monatomic. At room temperature and pressure, they are unreactive gases. Because of their lack of reactivity, for many years they were called inert gases or rare gases.