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What particle is needed to begin a nuclear chain reaction?
Neutrons are the important particles of nuclear chain reactions and the reactions depend on them. The neutrons do not really start the fission, reaction, however, because the neutrons come from fission in the fuel.The material in the fuel, typically a mix of 235U and 238U, undergoes fission spontaneously. When a fission event happens, more neutrons, typically two or three, are emitted. These bounce about from atom to atom, until they cause another atom to undergo fission, releasing more neutrons to increase the rate at which atoms undergo fission.But the neutrons needed for the chain reaction are actually produced by the fuel spontaneously, and these are produce in an ongoing manner with or without critical mass. So it is not a particle that starts the chain reaction; it is the act of putting together a critical mass.
Why is it necessary for a collision between atomic particles to occur so a nuclear reaction may begin?
High Energy produced with high velocity which required for nuclear reaction
What is needed to begin a chemical reaction?
The most important: to have the reactants !
Why is a spark of energy needed to begin the chemical reaction of burning fossil fuels?
You need to get the reaction above its activation energy before it will start.
What are the names of the particles involve in a nuclear reaction?
If we are just considering the "basic" nuclear reaction in a "regular" nuclear reactor, the particles of interest are the uranium-235 atoms (which are fissionable), and the neutrons, which get loose and cause fissions when they are absorbed by the U-235 atoms. We could broaden this to include some other reactions, but this is a fabulous place to begin to investigate nuclear physics.
What is the past particle of Begin?
"Begun" is the past participle of "begin."
What happens to a particle of a substance when it expands?
individual particles do not expand, when a substance expands it is the dead space between the particles that expands and the particles begin to move around (assuming the substance was solid to begin with). If a particle did expand it would loose cohesion and break apart (possibly creating an atomic reaction depending on how it was expanded)
What describes the energy of activation?
Activation energy is the least amount of energy needed to start a chemical reaction. It is used to activate atoms or molecules in order for them to begin a chemical reaction.
How do catalyst affect the energy of reaction?
Catalysts greatly reduce the amount of activation energy needed to begin a reaction.
What caused the nuclear reactor to begin to melt down in japan?
the cause of the melt down of the reactors in japan is the water that is needed to cool down the reactors
When did the nuclear age begin?
1945
How do reactions begin?
one particle has to travel rely fast
