Hydrogen as you all know has the simplest atomic structure among all the elements around us in nature. In the atomic form it consists of only one proton and one electron. In the elemental form it exists as a diatomic molecule called dihydrogen: H2. This element is of paramount importance as it is going to be the future fuel. Presently it is used as a fuel for giving the necessary upthrust for rockets. Therefore the study of hydrogen is vital. It has the electronic configuration 1S1. Hydrogen exists in three isotopic forms namely protium which is normal hydrogen, deuterium and tritium. The latter two are called heavy hydrogen. and tritium is radioactive.