Diamond and graphite contain only carbon atoms, yet they are very different objects with very different properties. Why are diamond and graphite different?

Question

A.
Their subatomic particles are different.
B.
They contain different atoms.
C.
They contain different elements.
D.
Their atoms are arranged differently.

Answer 1

The correct answer is:

D. Their atoms are arranged differently.

Diamond and graphite are both forms of carbon, but they have different properties because the carbon atoms are arranged in different structures. In diamond, each carbon atom is bonded to four others in a tetrahedral structure, making it very hard. In graphite, the carbon atoms are arranged in layers of hexagonal lattices that can slide over each other, making it soft and slippery.