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...erty}}}| cellWidth={{{cellWidth}}} | cellHeight={{{cellHeight}}} | eName = Helium | colorscheme = {{{colorscheme}}}| eSym = He}}

...4He) (24% of total mass) and trace amounts of the isotopes deuterium (2H), helium-3 (3He) and lithium (7Li). Subsequently the interstellar medium within gala

|{{Cel | cw={{{cellWidth}}} | ch={{{cellHeight}}} | nam= Helium | cs = {{{colorscheme}}}| eSym = He}}

:::PS Electron and helium nucleus (positive particle) beams are often referred to as beta and alpha r ...are funny in that they have no mass. Alpha and beta radiation consists of helium nuclei and electrons, respectively, and here the particle-wave duality str

...crease can be obtained by cooling the electronic components to near liquid helium temperatures, which greatly decreases electronic noise.

|{{Rpc |{{{1|}}}|{{{2|}}}|{{{3|}}}|{{{4|}}}|{{{5|}}}|{{{6|}}}| eName = Helium | colorscheme = {{{colorscheme}}}| eSym = He}}

...electrodynamics]], the physics of the superfluidity of supercooled liquid helium, and particle theory. His work on quantum electrodynamics made him a joint

.... Pierce]] in command. The airship was also switched over from hydrogen to helium gas, which reduced payload but improved safety.

...ft "> 2 <td> [[Helium|He]] <td width="5%" > [[Helium/Atomic mass|{{:Helium/Atomic mass}}]] <td width="15%"> <td align="left "> 39 <td> [[Yttrium|

...bacterial strains or sperm samples. It is also used, usually with liquid helium, to cool superconducting magnetic materials for a variety of instruments in

...e center, surrounded by a liquid N2 bath. N2 is filled every week or two, helium every 6-8 weeks. I don't recall the Gauss conversion, our magnets are abou ...Next we get patients needing an MRI scan worried about the liquid nitrogen/helium and what it can do to them :). I will delete the reference to cuperconducti

...f our Sun can continue to burn each element synthesised in turn, hydrogen, helium, then [[carbon]], [[oxygen]], [[silicon]] and so forth until they are left

...e day you walk into a laboratory and there are all these pipes, and liquid helium is flowing, and currents are coming in and out with complicated wiring, and

...pe within a teletherapy unit; x-rays, electrons, protons, alpha particles (helium ions) and heavy charged ions, produced by particle acceleration; and neutro

*Other gases: [[nitrogen]] (N₂) and [[helium]] (He). ...distillation|distillation]]. This process can be modified to also recover helium, if desired.

...a very active variable star. As a star of low mass it converts hydrogen to helium very slowly compared to our own star. Sol. This slow conversion creates a t

|align=center| [[Helium|He]] ||align=center| 2702.7 ||align=center| 3.7 E-4||align=center| 14.97 E4 ...b>2</sub>]] || align=center| [[Nitrogen|N₂]] || align=center| [[Helium|He]] || align=center| [[Neon|Ne]] || align=center| [[Argon|Ar]] || align=ce

...a particles produced per second and one only has to measure the volume of helium gas produced per unit of time to know the number of atoms per volume, i.e., ...pp. 586-604 (1911)</ref> The first experiment gave 6.58 mm³ of helium gas at 0°C and 760 mm pressure, while the second gave gave 10.38 mm<sup>3<

|[[Helium |{{ {{#ifeq:{{{elSym}}}|He

...ments using a sheet of gold foil through which were fired alpha particles (helium nuclei containing two positive charges)<ref> see [[Alpha decay]]</ref><ref> ...is in fact a stream of particles, as Rutherford discovered later in 1908, helium atoms without their two electrons. Beta radiation is a stream of electrons.