A+E Networks. On this day in 1969, Americaâs first automatic teller machine (ATM) makes its public debut, dispensing cash to customers at Chemical Bank in Rockville Center, New York.
This modification of the energy levels of a hydrogen atom due to a combination of relativity and spin-orbit coupling is known as fine structure.
Hydrogen is a diatomic element and you will never find it as H in nature. It will either be H2 if it is the only element present or H and another element. The Molecular formula is H2 because that is how the molecule is in nature. The chemical formula is H. Like salt or sodium chloride.