... types of tiny things called atoms, such as hydrogen, helium, carbon and oxygen ... that the star shown here is made nearly entirely of only hydrogen and helium atoms ...
... Its mass is about 2 x 10 30 kg, consisting mainly of hydrogen (90%) and helium (10%). ... the Sun a continuous nuclear fusion is converting hydrogen into helium at a temperature of about 16 million degrees of Kelvin ...
... HELIUM (He): The second element in the periodic table, has 2 protons, 2 neutrons ... Helium was discovered in 1825 by Sir W. Ramsay of England, and N. Lenget and P.T ... Helium melts at -272.2 degrees Celsius, and boils at -268.934 degrees Celsius. ...
... Impurities on New Phase Nucleation under Bcc-Hcp Phase Transition in Helium Solid ... 15.50 - 16.20 J. Eloranta "Solvation of Impurities in Bulk Superfluid Helium" . ...
... Helium is a gas which is lighter than air.б The atomic number of helium is two ... helium is lighter than air.б Think of it a bit like a boat floating on the water or ...
... Гелий (от греч. helios-солнце; лат. Helium) He, хим. элемент VIII гр. периодич. системы, ат. н. 2, ат. м. 4,002602; относится к благородным газам . ...
... better than 1 MHz; · Cryogenic module is designed as a 50 mm diameter insert that fits into a transport liquid helium vessel or a special refrigerator; · Dedicated PC-based acquisition system is available for computer control of the spectrometer operation ...
... research of heat and mass exchange in the boundary layer of models flown over by supersonic gas flow (air, argon, helium, etc ... Low consume make it possible to use inert gases (argon, helium, etc) as a working medium. ...