Hydrogen is a chemical element with chemical symbol H and atomic number 1. With a standard atomic weight of circa 7000100800000000000♠1.008, hydrogen is the lightest element on the periodic table. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. Non-remnant stars are mainly composed of hydrogen in the plasma state. The most common isotope of hydrogen, termed protium (name rarely used, symbol 1H), has one proton and no neutrons. The universal emergence of atomic hydrogen first occurred during the recombination epoch. At...

Ubuntu may refer to: Ubuntu (philosophy), an ethical concept of southern African origin == Computing == Ubuntu (operating system), a Linux computer operating system distribution Ubuntu (typeface), a font family Ubuntu Titling, a font Ubuntu Edge, a prototype smartphone == Other uses == Ubuntu Cola, a carbonated soft drink Ubuntu Local Municipality, Northern Cape, South Africa Ubuntu Party, South African political party Ubuntu Goode, a character in The Goode Family == See also == All pages beginning with "Ubuntu" All pages with titles containing Ubuntu...