Hydrogen is the first element on the periodic table.
It is the oldest, lightest and most abundant element in the universe, but on earth it is usually found in compounds such as water.
The Elemental podcast is celebrating 150 years since the periodic table was first published by Russian chemist Dmitri Mendeleev.
Find out more about events during the United Nation’s International Year of the Periodic Table.
Nights with Bryan Crump is also celebrating the chemical elements during their Friday night Sonic Tonic and Element of the Week.
Professor Allan Blackman is at Auckland University of Technology.