How Atoms Shape Substances Practice Test

Diamond and graphite have different properties because diamond has carbon atoms but graphite has iron atoms mixed in.

Diamond is hard because its carbon atoms are connected in a strong 3D network, while graphite is soft because its carbon atoms are in layers that can slide past each other.

Diamond is hard because it is used in jewelry, while graphite is soft because it is used in pencils.

Graphite is soft because it is a liquid at room temperature, but diamond is solid at room temperature.