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- Periodic table (7298 bytes)
6: ...in a group have similar configurations of their [[valence shell]] electrons, which gives them similar prope... - Chemistry (12553 bytes)
61: ...uch as [[complex (chemistry) | metal complexes]], valence bond theory fails and alternative approaches whic...
66: ... Physical properties, such as [[density]] and [[refractive index]] tend to fall within values characte...
93: ... intrinsic energy of the molecules themselves, or from an external source which will generally acceler... - Atom (12300 bytes)
58: ...rbitals just gradually go to zero as the distance from the nucleus increases. For atoms that can form ...
69: ===Valence and bonding===
70: ...he electrons in the outermost shell, called the [[valence electron]]s, have the greatest influence on chemi...
72: [[Image:HAtomOrbitals.png|frame|right|The [[electron orbital]] [[wavefunction]...
74: Each shell, numbered from the one closest to the nucleus (lowest in energ... - Helium (36603 bytes)
60: | [[Valence]]
106: ...a low [[temperature]] separation process called [[fractional distillation]].
108: ...spectroscopy | spectral line]] signature in light from a [[solar eclipse]]. Since then large reserves ...
112: ...0 [[Kelvin|K]] at 1 atmosphere) does it cool upon free expansion. Once precooled below this temperatu...
114: ...reactive under all normal conditions due to its [[valence]] of zero. It is an electrical insulator unless ... - Xenon (12457 bytes)
182: ...describe this [[chemical series]] since some zero valence elements do form compounds. In a [[gas filled tub...
185: ...ght and they have intense emissions in the near infrared, which are used in some night vision systems....
192: ...the engine, inert nature makes it environmentally friendly and less corrosive to ion engine then other...
195: ...is Travers]] in [[1898]] in the residue left over from evaporating components of liquid air.
198: ...his noble gas is naturally found in gases emitted from some [[mineral spring]]s. Xe-133 and Xe-135 are... - Chemical bond (3955 bytes)
15: ...emistry)|metal complexes]] cannot be described by valence bond theory, and we need [[quantum chemistry]] (b...
19: ... energies based on the AOs of the atoms they came from. Unlike pure ionic bonds, covalent bonds may ha... - Solar cell (27643 bytes)
3: ...rically used in situations where electrical power from the [[grid]] is unavailable, such as in remote ...
5: ...ell.png|thumb|250x|right|A '''solar cell''', made from a poly-crystalline silicon wafer]]
10: ...he [[etymology]] of the term "photovoltaic" comes from the [[Greek language|Greek]] ''photos'' meaning...
22: ...ls tend to be expensive, and because they are cut from cylindrical ingots, they cannot completely cov...
23: ...be formed into square shapes that cover a greater fraction of a panel than monocrystalline cells, and ...
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