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Science Secrets and the Atomic
The Atom as a Homogeneous Ball
The Weights of Atoms
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absorbed alpha particles Aston atomic bomb atomic number atomic power atomic weapons atomic weight atomic-energy barium beam become beryllium bonds captured cathode chain reaction chemical chlorine column combine compounds contains deuterium diffusion easily elec electricity electron-volts elements emitted fast neutrons Fermi Figure fissionable material gamma rays gases Geissler tube gram graphite heat heavy water helium helium nuclei Hiroshima holes hydrogen atom idea ions J. J. Thomson laboratory lattice pile light lithium magnet ments metal million molecules nations negatively charged neon neutralized nuclear nucleus number of electrons ordinary oxygen atom packing factor Periodic Table photographic plate physicists plants plutonium positive charges positive rays possible pound of U-235 problem produced properties protons protons and neutrons purified radium reactor relatively result scientists separation slow neutrons sodium Soviet Union spot stable structure substances surface thermonuclear thorium tion trons uranium uranium fission Urey whole numbers zinc sulfide