Question
How does the atomic hydrogen or oxy-hydrogen torch function for cutting and welding purposes? Explain.
Solution
Atomic hydrogen is formed by passing dihydrogen gas through electric are struck between two hydrogen two tungsten electrodes, when dihydrogen molecules dissociate into H-atoms. 
The life period of atomic hydrogen is 0.3 sec. Consequently, it returns to molecular form (H2) liberating a tremendous amount of energy which is used for cutting and welding purposes in the form of atomic hydrogen. 
