what element is found in gas
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 (H 2 O). Each molecule of water is made up of two hydrogen atoms bonded to one oxygen atom. In 1766, during an acid metal reaction, Henry Cavendish first formally recognized hydrogen.