The existence of radiation was discovered in 1896 by Henri Becquerel in the course of experiments involving uranium salts, though the nature of it was unknown.
The nature of the alpha particle was discovered by Ernest Rutherford, and he showed it was essentially an helium nucleus in 1907.
alpha, to Thorium-231
The alpha radiation emitted from uranium isotopes is an ionizing radiation.
This is an alpha decay.The half-life of uranium-238 is 4,468.10ex.9 years.
uranium is a radioactive substance which can cause mutations in cell while potassium is non-radioactive. in fact it is required in our body for transmission of nerve impulse and osmoregulation. ----------- Potassium-40 is also radioactive ! But uranium is also a toxic element and as a radioactive element is more dangerous that potassium (alpha particle emitter, gamma irradiation, radioactive descendents as radon).
238U --> 234Th + 4He 234Th --> 234Pa + e- 234Pa --> 234U + e- 234U --> 234Np + e-, not possible
alpha, to Thorium-231
Uranium undergoes radioactive decay and emits alpha particles which can damage tissue.
Alpha decay
Uranium 235 and uranium 238 are especially alpha particles emitters. They are natural radioactive isotopes.
Naturally occurring alpha particles are mostly from cosmic radiation and radioactive isotopes such as Americium and Uranium.
The alpha radiation emitted from uranium isotopes is an ionizing radiation.
Alpha decay
This is an alpha decay.The half-life of uranium-238 is 4,468.10ex.9 years.
227Ac----- alpha decay---- 223Fr
This is an alpha decay.
uranium is a radioactive substance which can cause mutations in cell while potassium is non-radioactive. in fact it is required in our body for transmission of nerve impulse and osmoregulation. ----------- Potassium-40 is also radioactive ! But uranium is also a toxic element and as a radioactive element is more dangerous that potassium (alpha particle emitter, gamma irradiation, radioactive descendents as radon).
Radioactive metals like uranium, titanium which emit alpha, beta & gamma rays.