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- Atom (12300 bytes)
43: ...fferentiable as a certain [[chemical element]]. Only 90 elements (of 112 now known) have been identif...
58: ... this to the size of the [[proton]] which is the only particle in the [[nucleus]] of the hydrogen atom...
63: The [[mass number]], atomic mass number, or nucleon number of an element is the total number of proto...
80: ...ly most outward is the valence shell, even if it only has one electron.
94: ...is all that we can observe since the universe is only about 14 billion years old. - Proton (5009 bytes)
18: |[[Nucleon]]
59: ... hydrogen nuclei. Rutherford determined that the only place this hydrogen could have come from was the... - Helium (36603 bytes)
104: ... are the lowest among the elements and it exists only as a [[gas]] except in extreme conditions. Extre...
112: ...aning it heats up when allowed to freely expand. Only below its [[Joule-Thomson inversion temperature]...
114: ... [[band system]]s, and HgHe, which is apparently only held together by polarization forces <!-- ref: '...
117: ...T] it is 50 times more compressible than water. Unlike any other element, helium will fail to solidif...
120: ... the lambda point, when it stops boiling and suddenly expands. The rate of expansion decreases below t... - Iron (23778 bytes)
139: ...ucleus of iron has the highest binding energy per nucleon, so it is the heaviest element that is produced e...
146: ... [[sulfur]], [[silicon]] and [[phosphorus]]. Its only significance is that of an intermediate step on ...
167: ...tricate shapes, but is too brittle to be worked, unless the product is ''decarburized'' to remove most...
169: ...elopment lagged in Europe, as the smelters could only achieve temperatures of about 1000 K. Through a ...
220: ...target proteins. [http://www.plosbiology.org/plosonline/?request=get-document&doi=10.1371%2Fjournal.pb... - Neutron (7687 bytes)
11: <tr><td>[[Nucleon]]</td></tr>
28: ... [[hydrogen]], which consists of a single proton only) consists of protons and neutrons.
36: ...er, is unaffected by such forces; it is affected only by the very short-range [[strong nuclear force|s...
40: ...disintegrations; there is no natural supply. The only means we have of controlling free neutrons is to...
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