The alpha particle was discovered by Ernest Rutherford. For more details see the links below.
Henry Becquerel
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.
Alpha particles are helium-4 nuclei; they do not contain electrons.
They don't, or at least, the effect is negligible. Alpha particles can be deflected with a sheet of paper.
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.
Beta particles, from beta- decay, have a charge of -1. Beta particles, from beta+ decay, have a charge of +1. Alpha particles have a charge of +2.
Ernest Rutherford and Paul Villard discovered alpha particles in the period 1899 to 1900, by classifying radiation into three types, alpha, beta, and gamma. Ernest Rutherford and Thomas Royds subsequently proved, in 1907, that alpha particles were helium ions.
Alpha particles can be absorbed by water.
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.
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.''
Ernst Rutherford discovered beta decay. Henri Becquerel discovered that there were emissions somewhat like X-rays originating from uranium. Ernst Rutherford discovered that two different kinds of emissions were coming from the uranium, and he named these alpha and beta. He published a paper on this in 1897.
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
alpha particles.
Protons were discovered when the nucleus of atoms were discovered. Electrons were already known about, so when the nucleus was discovered, it was known that it had to contain positively charged particles: protons. The nucleus was discovered by Ernest Rutherford by shooting alpha particles (helium nuclei, basically helium without the electrons) at a thin sheet of gold. Most of the alpha particles went straight through, but some if them were scattered. Rutherford deduced that these particles had hit something in the foil that didn't take up a large percentage of space: the nuclei of the gold atoms.
alpha particles would have twice as many beta particles
Rutherford shot high-energy alpha particles (two protons and two neutrons, or a helium nucleus) at the gold foil. A small fraction of these alpha particles bounced back, and that is how Rutherford discovered the nucleus.
some of alpha particles were deflected through an angle of 90 degree
Alpha particles but also electrons and gamma radiations (Th 232).