Protons are only one atom. mass unit and alpha's are 4 a.m.u.
Hydrogen is not only the lightest but the only known element with only 1 proton per atom.
Protium (Hydrogen-1) is the lightest and by far the most common isotope of hydrogen.
No, alpha particles are not the most radioactive emission. Gamma rays are more penetrating and more energetic than alpha particles, making them the most dangerous and damaging form of radiation.
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.
The lightest and smallest atom is hydrogen. It has a single proton and a single electron. There are some other isotopes of hydrogen that have one or more neutrons. Although those isotopes are naturally occurring, they are rare and for most purposes, we can ignore their existence.
Alpha particles.
These particles are: proton, neutron, electron.
A Neutron weighs more than a proton. Than an electron. A Neutron weighs the most, and an electron weighs the least. A proton is in the middle. Although there are these three sub atomic particles, an atom is made up of 99 percent empty space! But from greatest to least in mass, it goes neutron, proton, then electron!
alpha particles
Gamma rays have higher penetrating ability compared to alpha and beta particles. Gamma rays can penetrate through most materials, while alpha particles can be stopped by a sheet of paper and beta particles by a few millimeters of aluminum.
No, it cannot. Fission is the "splitting" of an atom, and a hydrogen atom will not fission. Some hydrogen atoms have a neutron stuck to the proton in their nucleus. Some even have two neutrons stuck to that proton. These neutrons can be "knocked loose" in something like a nuclear chair reaction in a weapon. The neutrons then can contribute to the building of the nuclear chain reaction. But fission doesn't happen to hydrogen.
Angle of deviation closer to the nucleus is greater that father from nucleus. These deviations are caused by repulsion of like charges, that is the proton and the alpha particle. Most of the alpha particles pass through, not deviated by large angles, and few rebound back. :D