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- Chemistry (12553 bytes)
5: ... form of [[atom|atoms]], chemists often study how atoms interact to form [[molecules]] and how molecules...
30: === Atoms ===
33: An [[atom]] is a collection of matter consisting of a posit...
38: ...and all atoms with 92 protons in their nuclei are atoms of the element [[uranium]].
40: ...|by symbol]], and by [[List of elements by number|atomic number]] are also available. - Giordano Bruno (15356 bytes)
37: ...eceive it.'' All his works were placed on the ''[[Index Librorum Prohibitorum]]'' in [[1603]]. Four hundr...
63: ...discontinuous in structure, made up of discrete [[atom]]s. This animism (and a corresponding disdain for... - Ionosphere (19365 bytes)
8: ...f dislodging an [[electron]] from a neutral gas [[atom]] or [[molecule]] during a collision. At the sam...
36: ...r, there are seasonal changes in the molecular-to-atomic ratio of the neutral atmosphere that cause the ...
85: ...ontal component of the geomagnetic field. A new K index is determined at the [[Table Mountain]] Observato...
87: ...ate of the ''ap'' index, called the ''planetary A-index'' (PAI). - Graphite (4209 bytes)
29: | [[Refractive index]]|| Opaque
56: ... electrons]] delocalized across the [[hexagonal]] atomic sheets of carbon contribute the graphite's [[co... - Helium (36603 bytes)
17: | [[Atomic mass]]
104: ...as]] series in the [[periodic table]] and whose [[atomic number]] is 2. Its [[boiling point | boiling]] ...
112: ... of Chemical Elements'', page 261 -->. Helium's [[index of refraction]] is closer to unity than any other...
117: ...h solid from liquid helium since the [[refractive index]] of the two phases are nearly the same. The soli...
122: ...ndom molecular motion ([[heat]]) from masking the atomic properties<!-- ref: ibid -->.
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