# Are there any trends for electrical conductivity?

Which element has the greatest electrical conductivity?
(A) $$\ce{As}$$ (B) $$\ce{Ge}$$ (C) $$\ce{P}$$ (D) $$\ce{Sn}$$

I am unsure of how to approach this problem. Is there some sort of trend for electrical conductivity or some other method to determine which of these answers the question?

I am pretty sure it is not $$\ce{Ge}$$ as that is used for semi-conductors, and am pretty sure it is not $$\ce{P}$$ because that is a non-metal but I don't know how to narrow down between the others.

• Phosphorus allotropes are white, red, and black. Arsenic allotropes are gray, yellow, and black. Germanium allotropes are alpha- and beta-. Tin allotropes are white and gray (Napoleon learned about that outside Moscow). Have some fun with the question, doi:10.1063/1.1729699 Mar 19 '14 at 14:21

• remember typical electricity-related uses of $\ce{As}$ and $\ce{Sn}$
Did you ever form a conducting connection between electronic components (or just some wires) by soldering? $\Leftarrow$
(Do you recall that $\ce{GaAs}$ is used as a semiconductor material in thin film solar cells?)