SCIENCE SECURITY NOTICE ELEMENTAL PREVIOUS ELEMENT THE PERIODIC TABLE OF ELEMENTS PLUTONIUM ISOTOPE PLUTONIUM 244 ATOMIC ATOMIC WEIGHT MELTING POINT BOILING POINT GRAMS CUBIC PHASE ROOM TEMPERATURE SOLID METAL PERIOD ACTINIDE RADIOACTIVE ARTIFICIALLY THE DWARF PLANET PLUTO PRONOUNCED GLENN JOSEPH EDWARD MCMILLAN ARTHUR BOMBARDING DEUTERONS DEVICE FREE DAYS BETA DECAY CONDUCTED WORK THE UNIVERSITY OF CALIFORNIA DISCOVERY REVEALED THE REST THE SCIENTIFIC COMMUNITY WARTIME STABLE ISOTOPE ALPHA DECAY DECAY SPONTANEOUS FISSION USES OUTSIDE BASIC RESEARCH RADIOISOTOPE THERMOELECTRIC ELECTRICITY SPACE PROBES VENTURE TOO FAR THE SUN SOLAR CASSINI GALILEO UNDERGO FISSION CHAIN REACTION ENOUGH CONCENTRATED THE HEART MODERN NUCLEAR WEAPONS NUCLEAR OCEANIC NUMBER STABLE ISOTOPES IONIZATION ENERGY OXIDATION STATES ELECTRON SHELL CONFIGURATION PAGE STEVE LINKING INFORMATION