Property and uses of hydrogen
The chemical symbol of hydrogen is H. It is an element with atomic number 1, this means that 1 proton is found in the nucleus of hydrogen.
Hydrogen is the lightest, simplest and most commonly found chemical element in the Universe, making up around 75% of its elemental mass.Hydrogen is found in large amounts in giant gas planets and stars, it plays a key role in powering stars through fusion reactions.Hydrogen is one of two important elements found in water (H2O). Each molecule of water is made up of two hydrogen atoms bonded to one oxygen atom.
Abundance of Hydrogen
% in Universe 75%
% in Sun 75%
% in Meteorites 2.4%
% in Earth's Crust 0.15%
% in Oceans 11%
% in Humans 10%