what are alpha particles of a particular element?

Answer 1

Alpha particles are made up from 2 protons and 2 Neutrons (technically they are a Helium Nucleus).

They are sometimes emitted by Radioactive Elements such as Uranium 238.

Uranium 238 gives Thorium 234 + Alpha Particle (Helium 4) in it's first stage of decay.

Answer 2

Alpha particles (named after the first letter in the Greek alphabet, α) are a highly ionizing form of particle radiation that have low penetration. They consist of two protons and two neutrons bound together into a particle identical to a helium nucleus; hence, it can be written as He2+,Alpha particles are emitted by radioactive nuclei such as uranium or radium in a process known as alpha decay.When an alpha particle is emitted, the atomic mass of an element goes down by roughly 4.0015 amu, due to the loss of 2 neutrons and 2 protons. The atomic number of the atom goes down by 2, as a result of the loss of 2 protons; the atom becomes a new element.

Answer 3

Some heavy radioactive elements emit a particle alpha which is the nucleus of the stable atom He 4

When a particle alpha is emitted , the emitting nucleus looses two protons and two neutrons. SO the resulting nucleus has an atomic number Z diminished of 2 and the mass number by 4

Answer 4

Alpha particles (like other forms of radiation) are not "of a particular element", all alpha particles are the same, wherever they come from.