The answer is
a symmetrical molecule.
Electrons are free to move throughout metal substance, shared throughout so electricity and heat are conducted well
I'm pretty sure its metals that make good conductors.
Answer: C) Elements and pure compounds are homogeneous materials because they have a uniform composition throughout.
Explanation: Element is a pure substance which is composed of atoms of similar elements. Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass.
Elements are compounds form homogeneous materials as they have uniform composition throughout and the components are evenly distributed throughout the material.
Mixtures are heterogeneous materials as they do not have uniform composition and the components are not evenly distributed throughout the material.
True,I think.(so don't really count on my answer sorry :D)