When a hydrogen-3 nucleus undergoes radioactive decay, it emits a beta particle (specifically an electron) and an anti-neutrino to transform into helium-3.
The decay of radioactive substances follows a decay chain that will sooner or later result in the appearance of a stable isotope of lead. There is an exception for the atoms of a few substances that have undergone decay by spontaneous fission.
The decay of an unstable nucleus is often accompanied by the release of energy in the form of radiation, such as alpha particles, beta particles, or gamma rays. This decay process helps the nucleus reach a more stable state by changing its composition or structure.
Dental Caries is the scientific name for 'tooth decay.'
Radioactive decay has the following properties: 1. No element can completely decay. 2. The number of atoms decaying in a particular period is proportional to the number of atoms present in the beginning of that period. 3. Estimate of radioactive decay can be made by half life and decay constant of a radioactive element.
The 3 things that can happen during radioactive decay is the 3 parts of decay: Alpha decay, Beta decay, and Gamma decay. In alpha decay, which is the weakest part of decay, it has a positive helium neuclus(2 protons and 2 neutrons), and the particles will burn your skin, but can be easily stopped by a peice of paper. This is the most ionising as the helium nucleus can take electrons from other atoms and make them unstable. This can give rise to cancers as it distorts cells. In Beta decay (an electron or a positron) is emitted. In the case of electron emission, it is referred to as "beta minus" (β−). It can be stopped by 3mm of aluminum. Gamma decay, which is the strongest, can only be stopped by 3cm of lead. It has electromagnetic waves, it contains the most energy, and therefore is the most penetrating, but normally it just passes straight through the human body. Radioactive decay can be very harmful, and its best to stay away. This question has been anwsered by Rae-Ann Salisbury.
The lightest "element" that can undergo radioactive decay is the isotope hydrogen-3, which undergoes beta decay. The lightest element with no radioactively stable isotopes is technetium, and its isotopes have different modes of decay.
There are 3 forms:Alpha, ejection of a helium nucleus (2 protons and 2 neutrons)Beta, this has 3 variants itself but all involve the same processes: -Beta, +Beta, and K captureGamma, ejection of a very high energy photonThe 3 variants of Beta decay are: -Beta, ejection of an electron and a neutrino, while a neutron in the nucleus becomes a proton+Beta, ejection of a positron and a neutrino, while a proton in the nucleus becomes a neutronK capture, capture of an electron from the innermost shell (K shell) and ejection of a neutrino, while a proton in the nucleus becomes a neutron
The equation for the beta decay of 3H is: 13H --> 23He + -10e where -10e represents a negative beta particle or electron.
The isotope of hydrogen we call tritium is radioactive because all atoms of it have an unstable nucleus. Tritium, which is hydrogen-3, has a single proton in its nucleus (as you'd expect), and has two neutrons there as well. This combination of nucleons is not stable, and it will eventually decay (with a 12.32 year half-life). Said another way, the nuclear arrangement of a proton and two neutrons is not a stable one, so atoms of this isotope of hydrogen will be radioactive and will eventually decay. When any atom is "created" by fusion or other means (including nuclear decay), the nucleons (the protons and neutrons that make up its nucleus) have to "make a deal" as to how they are going to get along in the tiny volume of space that the nucleus occupies. Some arrangements of protons and neutrons just "aren't right" and are unstable, and this gives rise to characterizing the isotope as being radioactive. Tritium (H-3) is one such isotope.
148/64 Gd ---> 144/62 Sm + 4/2 He (apple executive)
They have a radiation weighting factor of 1. This is used in equivalent dose (H=DWr) As a use for comparison: - Alpha particles = 20 - Beta particles = 1 - Fast Neutrons = 10 - Slow Neutrons = 3