Some day, perhaps, we'll attempt to model a molecule, but that will be far more difficult than a simple atom.

Hydrogen is the simplest atom in nature; as a result, physicists have paid extensive attention to it over the past century.

This is the simplest atom, consisting of a proton and an electron.

This model explained quite well the structure of the simplest atom, hydrogen, which has only one electron orbiting around the nucleus.

Therefore, already the Coulomb interaction among produces a new solid-state effect compared with optical transitions in simple atoms.

Consider a very simple atom with just three possible states.

As the simplest atom known, the hydrogen atom has been of theoretical use.

Matt Voss Amanda, One "simple" way that atoms affect each other without coming near is through light.

One of the first systems to which the Schrödinger equation was applied was the simplest atom, hydrogen.

Some simple atoms have formedthree kinds of hydrogen, two of helium, for example.