I'm guessing here, but I think you are asking about nuclear fusion. in that case, what happens when a hydrogen atom hits a helium atom? Not much. Fusion would require two hydrogen atoms. What would happen when two hydrogen nuclei hit together? If the pressure and temperature were high enough, the two hydrogen nuclei would fuse, creating an atom of helium, along with a high explosive force and an extremely high release of heat.
If a particle hits a gold nucleus in a head-on collision, the two would come to a rest for a very brief moment and then the particle would bounce straight back. This is describing a hypothetical situation proposed for Rutherford's gold foil experiment where he confirmed a small positively charged nucleus was present in atoms.
To set off a fission reaction (the reaction that occurs in a nuclear reactor), a person must first pump a neutron into a heavy nucleus. So if a neutron is pumped into a uranium or plutonium nucleus capable of undergoing fission, the nucleus splits in two, and releases more neutrons, which hit more nuclei, which in turn send out even more neutrons, thus setting off a chain reaction where every time a neutron hits a nucleus, the nucleus splits in two and sends out more neutrons.
most of the light is absorbed, particularly compared to a painted door
Let's change this: what happens when gas hits fire? One molecule isn't enough to do anything. A fire needs three things to burn: fuel, oxygen and heat. If you hit a fire with a gas, one of three things can happen to the fire, depending on what gas you used. If you used a fuel gas, the flame will increase in size if there is enough additional ambient oxygen to react with the added fuel. (If your fire is in free air, there will be.) What happens to the molecule depends on what specific fuel gas it is. If you're burning hydrogen, it will combine with oxygen and become water. If you're burning a hydrocarbon, it will split up; the carbon will become CO2 and the hydrogen will become water. If you use inorganic fuels - ammonia and hydrogen peroxide are both flammable - you will get whatever reaction product that molecule will give you. If you used oxygen, the flame will also increase in size. Oxygen itself is not flammable, but fires require oxygen to burn so adding oxygen will make the fire burn better. If you used a nonflammable gas like carbon dioxide, it can do several things. It could shield the flame from oxygen or cool it, either of which will put the fire out.
When a fast-moving neutron hits a nonfissionable uranium-238 (U-238) nucleus and is absorbed, an atom of fissionable plutonium-239 (Pu-239) is produced.
Hydrogen, Helium, Methane, and methane ice Methane Looks Blue When Sunlight Hits It
Yes, but you really don't want to. The only nucleus that can be found in nature is the alpha particle, emitting through nuclear decay. This is the nucleus of a helium atom and when it hits, you, it steals two electrons and ionizes your skin. This causes radiation burns.
Uranus is made of 82.5% of molecular hydrogen ,15.2% helium 2.3 % methane ,and also known to have hydrogen deuteridexist with possible aerials of ammonia ice ,water ice ,ammonia hydro sulfide and methane ice
Carbon, mainly. Two helium nuclei make beryllium-8, which normally decays practically instantaneously back into the helium nuclei, but if a third helium nucleus hits it first it will make the stable carbon-12. More helium can then be added to make oxygen, neon, magnesium, silicon, sulfur, argon, calcium, titanium, chromium, iron, and finally nickel before the process becomes endergonic.
Two hydrogen atoms at extreme speed/heat merge into one helium atom with the loss in mass converted to heat, light and energy in form of waves. This is typical fusion. There are a few other theoretical fusions involving helium and higher order atoms.
The nuclear source of the sun's energy is hydrogen fusion. When the last of the remaining hydrogen is fused into helium, the sun will start fusing the resulting elements until it hits iron, at which point the fusion reactions will end. Larger stars will go farther down the periodic table before blowing themselves apart.
After it hits, it comes to a standstill.
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If a meteor hits you, in all likelihood, you will die.
it hits the magnetic feild and is reflected
something
u get hot