Final answer:
Diamond and graphite are made of pure carbon, but they have different properties due to their different arrangements of carbon atoms.
Step-by-step explanation:
Diamond and graphite are both made of pure carbon, but they have different properties due to their different arrangements of carbon atoms.
In diamond, carbon atoms are bonded together in a three-dimensional network, resulting in a rigid structure. This arrangement makes diamond incredibly hard and transparent.
In graphite, carbon atoms form layers that are loosely held together by weak forces. These layers can slide over each other easily, making graphite soft and suitable for use as pencil lead.