So far we have considered the transitions possible for individual atoms.

At the level of individual atoms, things are really quite random.

It's like saying the half life of an isotope might be ten years, but that's only for individual atoms.

These pieces can be either individual atoms or molecular fragments.

The lower limit can also be defined as being the size of individual atoms.

However, such an error can be critical when considering individual atoms.

Everything very small (single particles, individual atoms) is always changing.

That's not to say we can't manipulate individual atoms using other tools.

It can even make out the shapes of individual atoms.

At the level of individual atoms and molecules, there are no exact times.