At stp graphite and diamond are two solid forms of carbon which statement explains why these two forms of carbon differ in hardness

It seems that you have missed the necessary options for us to answer this question, but anyway, here is the answer. At STP graphite and diamond are two solid forms of carbon, the statement that explains why these two forms of carbon differ in hardness is this: Graphite and diamond have different molecular structures. Hope this helps.

Particle exchange energy though elastic collision , hope this .