helium

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Definition/MeaningWord/Phrase
positively charged particle that is the nucleus of the helium atom; emitted from natural or radioactive isotopes alpha particle
radioactive transuranic metallic element; discovered by bombarding uranium with helium atoms Am , americium , atomic number 95
any of the chemically inert gaseous elements of the helium group in the periodic table argonon , inert gas , noble gas
radioactive transuranic metallic element; produced by bombarding plutonium with helium nuclei atomic number 96 , Cm , curium
radioactive transuranic element; discovered by bombarding americium with helium atomic number 97 , berkelium , Bk
vacuum flask that holds liquid air or helium for scientific experiments Dewar , Dewar flask
nuclear weapon that releases atomic energy by union of light (hydrogen) nuclei at high temperatures to form helium fusion bomb , H-bomb , hydrogen bomb , thermonuclear bomb
mineral consisting of uranium oxide and trace amounts of radium and thorium and polonium and lead and helium; uraninite in massive form is called pitchblende which is the chief uranium ore pitchblende , uraninite
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