why elements belonging to group 18 have fixed atomic radius
Answers
Answer:
The noble gas atoms or the group 18 elements increase steadily in atomic radius from one period to the next due to an increasing number of electrons. This reflects the stability of their electronic configuration and points again to their relative lack of chemical reacti
Explanation:
☞ The noble gases are the chemical elements in group 18 of the periodic table. They are the most stable due to having the maximum number of valence electrons their outer shell can hold. Therefore, they rarely react with other elements since they are already stable.
☞ The atomic radii decrease across the Periodic Table because as the atomic number increases, the number of protons increases across the period, but the extra electrons are only added to the same quantum shell
☞ radon
radonThus radon has largest atomic radius.