[header] How to learn about the chemistry of the hydrogen atom [title] Hydrogen atom is the simplest atom of all the elements in the periodic table. [step] It is composed of a proton which is confined to the nucleus and an electron which circulates around the nucleus in circular motion. It is the third element in abundance on earth after oxygen and silicon. 
Its simple structure attracted the attention of physicist as to predict the structure of the atom not known for sure at that time. The bohr theory of the hydrogen atom was the first successful theory that predicted the structure and energetics of the hydrogen atom.