does Hydrogen and Helium combine? if so what are the products?
138774
no....helium is an inert gas and does not combine with anything.  However, Hydrogen and Helium can mix--they just never bond to form a compound.
313548
Hydrofluoric acid (HF) is what you need. The hydroxyl group will attach to the hydrogen (making water) , and the fluoride will move on to the rest of the molecule.
202305
Well, I can't completely answer this question.\n\nBut I would assume that the structure of anything would appear like the 'anything'.\n\nSo the chemical structure of C7H17 appears as C7H17.\n\nI do not know about the extra hydrogen.\n\nSorry if it's not useful, but it's all I got.
224912
Hmmm....\n\nYour science grade cannot be helped if you can't figure out that Hydrogen, a gas, is not an alkali metal.
152838
yes, it's the 1s orbital. The electron configuration of hydrogen is 1s1.  The electron configuration of helium is 1s2.
391485
You talking about liquid hydrogen here?\nIf you are then the answer is no....any other liquid would be above the boiling point of liquid hydrogen.
553379
The law of multiple peoportions does say that elements may combine in more than one ratio, such as H2O2 and H2O, and CO2 and CO\n\nWhere is your question?
310942
At standard temperature and pressure hydrogen is a colorless, odorless, nonmetallic, univalent, tasteless, highly flammable diatomic gas. Hydrogen is the lightest and most abundant element in the universe. It is present in water, nearly all organic compounds and in all living organisms. Hydrogen is able to react chemically with most other elements. Stars in their main sequence are overwhelmingly composed of hydrogen in its plasma state. The element is currently used primarily in fossil fuel upgrading. Other uses include as a lifting gas, as an alternative fuel (see Hydrogen economy), and more recently as a power source in fuel cells.\nHydrogen can be prepared in several different ways but the economically most important processes involve removal of hydrogen from hydrocarbons. Commercial bulk hydrogen is usually produced by the steam reforming of natural gas. At high temperatures (700–1100 °C), steam (water vapor) reacts with methane to yield carbon monoxide and H2.\n\nCH4 + H2O → CO + 3 H2 \nThis reaction is favored at low pressures but is nonetheless conducted at high pressures (20 atm) since high pressure H2 is the most marketable product. One of the many complications to this very optimized technology is the formation of coke or carbon:\n\nCH4 → C + 2 H2 \nConsequently, steam reforming typically employs an excess of H2O.\n\nAdditional hydrogen from steam reforming can be recovered from the carbon monoxide through the Water gas shift reaction:\n\nCO + H2O → CO2 + H2 \nOther important methods for H2 production include partial oxidation of hydrocarbons:\n\nCH4 + 0.5 O2 → CO + 2 H2 \nand water electrolysis.\n\nIn the laboratory, H2 can be generated by treatment of many metals with acids or base.\n\nZn + 2 H+ → Zn2+ + H2 \n2 Al + 6 H2O → 2 Al(OH)3 + 3 H2 \n\n\n\nA hydrogen economy is a hypothetical future economy in which the primary form of stored energy for mobile applications and load balancing is hydrogen (H2). In particular hydrogen is proposed as a fuel to replace the gasoline and diesel fuels currently used in automobiles.\n\nHydrogen production is a large and growing industry. Globally, about 50 million metric tons of hydrogen were produced in 2004; the growth rate is about 10% per year. The energy in the current flow corresponds to about 200 gigawatts. Within the U.S., production was about 11 million metric tons, or 48 GW (10.8% of the average U.S. total electric production of 442 GW in 2003). Because hydrogen storage and transport are so expensive, most hydrogen is currently produced locally, and used immediately, generally by the same company producing it. As of 2005, the economic value of all hydrogen produced is about $135 billion per year.\n\nCurrently, hydrogen production is 48% from natural gas, 30% from oil, and 18% from coal; water electrolysis accounts for only 4%.\n\nThere are two primary uses for hydrogen today. About half is used to produce ammonia (NH3) via the Haber process, which is then primarily used directly or indirectly as fertilizer. The other half of current hydrogen production is used to convert heavy petroleum sources into lighter fractions suitable for use as fuels. This latter process is known as hydrocracking. Because the world population and the intensive agriculture used to support it are both growing, ammonia demand is growing. Hydrocracking represents an even larger growth area, as rising oil prices encourage oil companies to extract poorer source material, such as tar sands and oil shale.\n\nStorage is the main technological problem of a viable hydrogen economy. Some attention has been given to the role of hydrogen to provide grid energy storage for unpredictable energy sources, like wind power. The primary difficulty with using hydrogen for grid energy storage is that converting power to hydrogen and back is not cheap.\n\nHydrocarbons are stored extensively at the point of use, be it in the gasoline tanks of automobiles or propane tanks hung on the side of barbecue grills
344155
lithium-6 + neutron ------> helium-4 +  hydrogen-3\n\nC
391491
There is helium all around us in the air, but it is not a good source for helium collectors. There are only about 5 parts of helium for every 100,000 parts of air! People have discovered much richer sources of helium underground. Some radioactive elements, such as uranium, release alpha particles when they decay. An alpha particle is just a helium atom with no electrons. Deep in the Earth where these radioactive decays take place, the alpha particles capture electrons and become helium. As the radioactive deposits age, large quantities of helium become trapped in underground caverns. To collect the helium, people drill down into the caverns and capture the helium as it escapes. \n\nMost people are familiar with helium balloons. We put helium in these balloons, because it is lighter than air and is non-flammable. However, most of the helium used today is in liquid form. All gases become liquids when the temperature becomes low enough, or when excessive pressure is used. Scientists use liquid helium for experiments that have to be kept very very cold. Helium becomes a liquid at 270oC below zero!
319978
Sounds like the typical process of using electrolisis to separate H2O in to Oxygen and hydrogen. The hho is  another way to write H2O
231727
Molecules came from atoms combining. Atoms came from protons, neutrons, and electrons combining. Protons and neutrons came from quarks combining. Quarks and electrons came from condensation from the high energy vacuum. Where that came is still a bit up in the air, but look at the website below:\n\nhttp://www.sciencedaily.com/releases/2006/05/060515232747.htm
451438
No, but hydrogen is not free roaming in the Earth, it's tied to oxygen (water)
126303
Hydrogen is the lightest and flamable, in other word, can be burned, element in its natural form, which is gas. Once it 's been turned into liquid itself, hydrogen does not hold its characteristics well because of the temperature is being used to keep the liquid form. So hydrogen, itself, already not stable.\nOxygen, on the other side, have most its characteristics in liquid or gas form. It is not flamable in the sense that it can not cause fire. But it can be burned and is needed for the existence of fire. So Oxygen is a little more stable.\nNow once Oxygen and Hydrogen combine together, because Hydrogen is very light, and Oxygen is heavier (it really involves all the atoms, especially electrons), Hydrogen tends to assume some characteristics of Oxygen. This includes the stable condition.\nAlthough after combined, they show to be very stable and hold very tight to each other, there was a explosion during the process of combining. As we know, water is the molecular compound, H2O, which means two molecules of hydrogen and a molecule of Oxygen in the mixture. In the normal process of making true water, an estimated amount of Hydrogen and Oxygen gases are put into tank with the ratio of 2:1. However, it is only estimated, so sometimes one gas can be a little more than the other. Also, they are both put in tank in very small amount at the time, then add some more. So the reaction would be slow and controllable.\nIf the two gases are put in at the same time, exact Hydrogen and Oxygen at the ratio of 2:1, and large amounts, they can become Water Bomb. Thus, water does reach a flash point (just not when heated).\nYour question is not stupid. It is very interesting and very smart. Normal people would not care to think out of the box or would not know more than they should. You should reward yourself for being brave enough to ask. But this is the important thing: I recommend you not to try the Water Bomb because it requires very detail and exact conditions. It should only be done in lab with supervisor. The explosion can be big...
150980
You can find noble gasses as trace amounts in the air, and are produced through various forms of nucleosynthesis in stars and supernovae.\n\n*Helium is a fusion product of main sequence stars and a fusion fuel for some Red Giant Stars\n*Neon is a fusion product of some red giant stars and a fusion fuel for massive stars nearing the end of their lives\n*Argon is produced by the decay of Potasium, and is often used as an inert gas while welding tungsten.\n*Krypton is a fission product of uranium, and used to make a powerful, short lived laser source.\n*Xenon is often used in high powered lamps\n*Radon is a decay product of Radium, and is radioactive, there are no to many common uses of Radon.
32949
Jupiter is about 90% hydrogen and 10% helium (by numbers of atoms, 75/25% by mass)
270753
A hydrogen bomb is a fusion bomb.\n\nThe uranium / plutonium bombs are fission bombs.\n\nBoth may properly be called atomic or nuclear bombs.\n\nThere are also combinations such as the fisson-fusion-fission bomb which combines features of both types.