Space-filling model of part of the crystal structure of lithium hydride. Lithium deuteride - The corresponding lithium-6 deuteride, formula 6Li2H or 6LiD, is the fusion fuel in thermonuclear weapons. In warheads of the Teller-Ulam design, a fission trigger explosion heats, compresses and bombards 6LiD with neutrons to produce tritium in an exothermic reaction. The deuterium and tritium (both isotopes of hydrogen) then fuse to produce helium-4, a neutron and 17.59 MeV of energy.
Hydrogen is a chemical element with chemical symbol H and atomic number 1. With an atomic weight of 7000100794000000000♠1.00794 u, hydrogen is the lightest element on the periodic table. Its monatomic form is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass.[note 1] Non-remnant stars are mainly composed of hydrogen in the plasma state. The most common isotope of hydrogen, termed protium , has one proton and no neutrons.
Nuclear fusion is considered the ultimate power source – using the heat from breaking apart radioactive elements and isotopes to drive steam-powered turbines, this technology would be virtually limitless. It’s far from a new concept, but complications in the physics have prevented it from being achievable. Holding two isotopes of hydrogen at 200 million degrees until they collide and fuse to make helium would require building a device that runs at ten times the temperature of the sun.
A fusion, or thermonuclear warhead, where the power unleashed is by fusing heavy isotopes of hydrogen into helium, uses a more conventional atom bomb that splits atoms as the triggering mechanism for the fusion.
#Curiosity discovers water in martian dirt! It's estimated that #Mars contains about 2% water by weight, meaning astronauts could extract roughly 2 pints of water out of every cubic foot of dirt. (Study published in Science on Sept. 26, 2013.)