Class 11
Hydrogen-Occurrence-Isotopes
1. Introduction: Alchemist Paracelsus, in the early 1500s noted that when iron filings were added to sulphuric acid colourless bubbles comes out. The same observation was made by Robert Boyle in 1671. In 1766 Henry Cavendish collected the bubbles and showed that when the gas burns it forms water. The gas was given its name…