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, says AUT's Allan Blackman, in ep 37 of Elemental.

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.

Go to this episode on rnz.co.nz for more details