When it comes to latent print deposits for fingerprints, what are the two categories of surfaces? Provide at least one example of each category.

The two categories is porous evidence and nonporous evidence. Nonporous item of evidence is when you put the latent print on the surface and it just sits on the surface. Porous item of evidence is when you put the latent print on the surface and it absorbs the latent print deposit.

it means there are 3 atoms of oxygen