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680 bytes added ,  01:13, October 2, 2007
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A '''subatomic particle''' is any particle that is smaller than or makes up an [[atom]]. At one time this included [[protons]], [[neutrons]], and [[electron]]s, which are known to make up all elements (except ordinary [[hydrogen]] does not have any neutrons). Since that time additional particles have been experimentally detected or theorized. These include [[quarks]] and [[gluons]] which are a level smaller still.

Other particles that are believed to exist in [[star]]s, but are not found naturally on the earth, are [[photons]] and [[neutrinos]].

Most of space on the subatomic level is empty, with only very small amounts having particles in them.

[[Category:Science]]
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