Br-apex
Helium
N (smallest radius) P As Sb (largest radius)
Br is the atom with the smallest. K+ is the ion with the smallest radius. In general, the shape with the smallest radius has the smallest diameter
Helium has the smallest covalent radius
K+
Atomic radius increases going down the periodic table and going from right to left, meaning that Fr (Francium) has the largest atomic radius and He (Helium) has the smallest. Therefore, Cl<S<P<Si<Al So the answer is Cl
It is helium that has the smallest atomic radius. Use the link below to see a list of elements arranged by atomic radius.
Argon doesnt have the smallest atomic radius, its chlorine.Argon has the largest atomic radius in period 3.
Lithium has the smallest atomic radius among the elements listed.
It is called the radius
The alkali earth metal with the smallest atomic radius would be beryllium(Be), number four
Atomic radii become larger as you go from top to bottom of the periodic chart, but they get smaller as you go from left to right. Therefore, the elements with the smallest radii are in the upper right hand corner. Of S, Al, Na, and Ba, sulfur is the closest to the upper right corner and has the smallest radius of those elements.