SCIENCE SECURITY NOTICE ELEMENTAL PREVIOUS ELEMENT THE PERIODIC TABLE OF ELEMENTS URANIUM ISOTOPE ATOMIC ATOMIC WEIGHT MELTING POINT BOILING POINT OR 74 GRAMS CUBIC PHASE ROOM TEMPERATURE SOLID METAL PERIOD ACTINIDE RADIOACTIVE THE PLANET PRONOUNCED DISCOVERED MARTIN HEINRICH KLAPROTH GERMAN MINERAL PITCHBLENDE URANIUM OXIDES KLAPROTH THE REST THE SCIENTIFIC COMMUNITY BELIEVED SUBSTANCE EXTRACTED PURE ACTUALLY URANIUM DIOXIDE NOTICING URANIUM TETRACHLORIDE FRENCH CHEMIST HEATING POTASSIUM PLATINUM RADIOACTIVITY ANTOINE HENRI BECQUEREL PHYSICIST DETECTED SAMPLE URANIUM ORES URANINITE CARNOTITE AUTUNITE PHOSPHATE ROCK LIGNITE MONAZITE SAND LITTLE DEMAND URANIUM METAL SOLD SODIUM DIURANATE ALSO KNOWN AS YELLOW CAKE TRIURANIUM OCTOXIDE NATURALLY NUCLEAR POWER INDUSTRY NATURALLY OCCURRING ISOTOPES FISSIONABLE MATERIAL NUCLEAR NUCLEUS RELEASE ENERGY SPLITTING SMALLER THE FRAGMENTS STRIKE ATOMS CAUSE SPLIT ENOUGH FREE NEUTRONS SUSTAIN NUCLEAR CHAIN REACTION CONCENTRATION THE HELP MODERATOR SLOW DOWN NEUTRON SLOW REACT NATURAL URANIUM GRAPHITE HEAVY WATER EXIST ONCE NORMAL WATER CAN COMMON CONVERTED FUEL PRODUCE EXPOSED MINUTES BETA DECAY DAYS 22 MINUTES ONE POUND AMOUNT BURNING TONS DENSE USES OUTSIDE TARGET AMMUNITION FOR SOME MILITARY WEAPONRY SHIELD COUNTERWEIGHT AIRCRAFT CONTROL INERTIAL GUIDANCE URANIUM COMPOUNDS CENTURIES COLOR YELLOW GLASS ITALY URANIUM OXIDE URANIUM TRIOXIDE ORANGE POWDER FIESTAWARE USED TO VASELINE GLASS SHOULD STABLE ISOTOPE ALPHA DECAY SPONTANEOUS FISSION MILLIGRAMS OCEANIC LITER NUMBER STABLE ISOTOPES IONIZATION ENERGY OXIDATION STATES ELECTRON SHELL CONFIGURATION PAGE STEVE LINKING INFORMATION