Which element is malleable and can conduct electricity in the solid phase?
(1) iodine (3) sulfur
(2) phosphorus (4) tin

(4) Tin is malleable and can conduct electricity in the solid phase

Explanation:

Metals are good to conduct electricity because their structure let electrons to flow freely as you can see in the image below.

Metals like tin, are malleable, it means that tin can be bend without breaking.

C) electrons encircling a nucleus with neutrons and protons

Both models are effective because they show the valence electrons, and these valence electrons indicate the reactivity of an element.