Question

Name the element: I am a non-reactive, stable element that has the smallest radius in my group.

Answer 1

The element with the smallest radius in the group of non-reactive noble gases is Helium (He), found in Group 18 of the periodic table.

Step-by-step explanation:

The element described as a non-reactive, stable element with the smallest radius in its group is likely to be Helium, which is a noble gas. The noble gases are found in Group 18 of the periodic table and are known for having a full valence shell of electrons, which makes them exceptionally unreactive. Among the noble gases, Helium (He) has the smallest atomic radius because it has the fewest number of electron shells.