Both the proton and the neutron have anti-particles. These also destroy each other if they meet with their particle. ... There are two heavier leptons called the muon (m) and the tau (t). Both are unstable and decay to simpler, more stable particles. Both have anti-particles. Muons are found in the air as cosmic rays enter...
www.krysstal.com/subatomic.html www.krysstal.com/subatomic.html
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Atom - Wikipedia, the free encyclopedia
Source
The atom is a basic unit of matter consisting of a dense, central nucleus surrounded by a cloud of negatively charged electrons. The atomic nucleus contains a mix of positively charged protons and e...
en.wikipedia.org/wiki/Atom
List of fictional elements, materials, isotopes and atomic particles - Wikipedia, the free encyclopedia
A fictional element, material, isotope or atomic particle is a chemical element, material, isotope or (sub)atomic particle that exists only in works of fiction (usually fantasy or science fiction). ...
en.wikipedia.org/wiki/List_of_fictional_elements,_mater... en.wikipedia.org/wiki/List_of_fictional_elements,_materials,_isotopes_and_atomic_particles
We now define radiation as the loss and/or exchange of unstable particle packages including gamma particle packages, X-ray particle packages, protoactive particles, neutroactive particles, microwave particles and radio wave particles.
ucadia.org/uca/u07/071900.htm
But some nuclei are unstable. An unstable nucleus is one that undergoes some internal change spontaneously. In this change, the nucleus gives off a subatomic particle, or a burst of energy, or both. As an example, an isotope of carbon, carbon-14, has a nucleus consisting of six protons and eight (rather than six) neutrons.
www.scienceclarified.com/Qu-Ro/Radioactivity.html
Table: Subatomic particles important in chemistry. ... particle symbol charge mass, kg mass, daltons ... All nuclei with more than 83 protons are unstable. But size isn't the only factor- the neutron/proton ratio must be just right for a nucleus to be stable. The optimal ratio is about 1:1 for light nuclei; it increases to about...
antoine.frostburg.edu/chem/senese/101/atoms/
According to the Standard Model of particle physics, the W and Z particles are the gauge bosons that mediate the weak force responsible for some types of radioactive decay and for the decay of other unstable, short-lived subatomic particles.
www.britannica.com/EBchecked/topic/655170/Z-particle www.britannica.com/EBchecked/topic/655170/Z-particle
Half-life - measure of the average lifetime of a radioactive substance (see radioactivity) or an unstable subatomic particle. One half-life is the time required for one half of any given quantity of... ... For example, the half-life of a particular radioactive isotope of thorium is 8 minutes. ... Half-life at Amazon...
xml.education.yahoo.com/reference/encyclopedia/entry/ha... xml.education.yahoo.com/reference/encyclopedia/entry/halflife
  There are many other subatomic particles  which may be generated at accelerator facilities. Generally speaking the higher the available energy ... They are all `radioactive' or unstable in that they decay with very short half-lives , ... In both the pion and muon decay another type of particle called a neutrino  is produced.
www.triumf.ca/EHS/rpt/rpt_2/node11.html
Canadian physicists working from the TRIUMF laboratory in Vancouver were instrumental in the discovery of an unusual breakdown of an unstable subatomic particle, the kaon.
www.triumf.ca/infoff/release97.html
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