out of: Si, P, S, and Cl, which has the smallest radius?

Question

out of: Si, P, S, and Cl, which has the smallest radius?
I think it is Phosphorus.

Paul · Answer

I actually think it is Cl

Anonymous · Answer

Is it? Silicon is 210pm, Phosphorus is 58pm, Sulfur is 103pm, and Chlorine is 100pm. So I figured Phosphorus...

DrBob222 · Answer

http://www.chemguide.co.uk/atoms/properties/atradius.html

chemaster · Answer

As you move from left to right, the atomic radius decreases. Therefore, Si would have the greatest radius.