Atomic oxygen is a highly reactive species, and can abstract a H atom from anything, including water.

In order to visualize the H atom, first we have to specify its energy state.

This pale yellow solid is related to 1,2-dichlorobenzene by the replacement of one H atom with a nitro functional group.

So for a H atom there is one electron.

Normally, H atoms by themselves only make H2 molecules.

It is how many H atoms it takes for a mass of one gram.

Having only C and H atoms, it's a very non-polar molecule.

Detailed scrutiny of such claims usually points to alternative pathways, not H atoms.

Thus, even at absolute zero there is no rigid molecular structure, the H atoms are always in motion.

The paper by Collins et al., however, shows the H atoms in the "exo" position.