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The "speed" of an alpha particle will be determined by what it is that generates that alpha particle. That's another way of saying that alpha particles, which are helium-4 nuclei, come in different energies. You will recall that they are generated in alpha decay, which is a form of radioactive decay. As to how "fast" they are in water, all we can state is an initial energy, and then do some calculations to determine how far they might go. As a sheet of notebook paper will stop an alpha particle, it will not travel very far in water. Small fractions of an inch is all we could expect for the distance they'd be able to go. Heck, they'd be bumping into water molecules right from the gate, and losing energy with each collision (which is called a scattering event). Links to related questions can be found below.
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Where could one locate Alpha particles?
Alpha particles are most commonly found when alpha decay occurs. An alpha particle is emitted during alpha decay. Further information about alpha particles can be found on the Wikipedia website.
How can you tell that the particles in a cup of water are moving slower or faster?
hot water has fast moving particles, and cold water has slow moving particles
Do the alpha particles in Rutherford's experiment contain electrons?
Alpha particles are helium-4 nuclei; they do not contain electrons.
How does Alpha particles affects us?
They don't, or at least, the effect is negligible. Alpha particles can be deflected with a sheet of paper.
What type of nuclear radiation can be blocked by a block of lead Beta particles or alpha particles?
Both Beta and alpha particles can be blocked by a block of lead. Alpha particles can even be blocked by a sheet of paper, and beta particles can be blocked by a thin aluminium plate.
What effect does humidity have on alpha particles?
Alpha particles can be absorbed by water.
Where could one locate Alpha particles?
Alpha particles are most commonly found when alpha decay occurs. An alpha particle is emitted during alpha decay. Further information about alpha particles can be found on the Wikipedia website.
What gives off alpha particles?
Alpha particles are a type of particle of radiation that is emmited by certain radioactive materials. The materials that give off Alpha particles are called ''Alpha emitters.''
How can you tell that the particles in a cup of water are moving slower or faster?
hot water has fast moving particles, and cold water has slow moving particles
What is the process in which fast water carries large particles and slow water carries small particles?
erosion
What is the range of beta particles in air as compare to alpha particles?
What is the range of beta particles in air as compare to alpha particles?Read more: What_is_the_range_of_beta_particles_in_air_as_compare_to_alpha_particles
Name the nuclear radiation that can be easily stopped by skin or cloths?
alpha particles.
If the mixture of electrically neutral how many more beta particles than alpha particles are in the balloon?
alpha particles would have twice as many beta particles
Why were few alpha particles deflected?
some of alpha particles were deflected through an angle of 90 degree
What particles can thorium emit?
Alpha particles but also electrons and gamma radiations (Th 232).
Alpha particles and beta particles differ in?
Alpha particles are positively charged helium nuclei while beta particle are negatively charged electrons . Alpha particle have 4u mass while beta particles have zero mass.
We can find out what state water is in by how fast these move. What are these?
Particles
