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- Proton (5009 bytes)
59: ... hydrogen nuclei. Rutherford determined that the only place this hydrogen could have come from was the...
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- Chemistry (12553 bytes)
80: ...oundly [[intuitive|non-intuitive]]. In practice, only the simplest chemical systems may realistically ... - Sun (20830 bytes)
135: [[Image:SunLayers.png|thumb|left|220px|Structure of the Sun]]
147: The core is the only part of the Sun where an appreciable amount of h...
162: ...space and its energy escapes the Sun entirely. Sunlight has a [[black-body]] spectrum that is charact...
168: It is about 4,000 [[kelvin]]s. It is the only part of the Sun cool enough to support simple mo...
181: ...produced by the nuclear reactions in the Sun was only one third of the number predicted by theory, a r... - Mitochondrion (10103 bytes)
36: Some mitochondrial functions are performed only in specific types of cells. For example, mitocho...
53: ...a strong ''diffusion gradient'' is built up. The only exit for these protons is through the ''[[ATP sy...
60: ...nce]]'' '''304''':981, May 2004, [http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed... - Lysosome (2936 bytes)
- Vacuole (5544 bytes)
- 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...
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. - Electricity (13894 bytes)
- Chemical element (8169 bytes)
7: There are [[as of 2004]], 116 known elements, only 91 of which occur naturally. The remaining 25 ar...
17: ...lized, even if it is derived from a proper noun (unless it would be capitalized by some other rule, fo... - Proton (5009 bytes)
59: ... hydrogen nuclei. Rutherford determined that the only place this hydrogen could have come from was the... - Boron (9084 bytes)
94: *[http://periodic.lanl.gov/elements/5.html Los Alamos National Laborator... - Carbon (15360 bytes)
15: ...d contains a high proportion of closed porosity. Unlike normal graphite, the graphitic layers are not ...
19: ...any fruits. The [[isotope]] [[carbon-14]] is commonly used in [[radioactive dating]].
51: ... beta form, when synthetically-produced graphite only contains the alpha form. The alpha form can be c...
53: ...ntly separated by other atoms, are held together only by [[van der Waals force]]s, so easily slip past...
87: ... [[United States]]; [[Russia]]; [[Mexico]]; [[Greenland]] and [[India]]. - Chlorine (10751 bytes)
44: ...] dissolves 3.10 liters of chlorine and at 30 ?C only 1.77 liters.
58: ... [[1774]] by [[Carl Wilhelm Scheele]], who mistakenly thought it contained [[oxygen]]. Chlorine was gi...
61: In nature chlorine is found only as the [[chloride ion]]. Chlorides make up much...
63: ...soluble in water, so solid chlorides are usually only found in abundance in dry climates, or deep unde...
73: ...sotopes with mass numbers ranging from 32 to 40. Only three of these isotopes occur naturally: stable ... - Fermium (6567 bytes)
51: ...y little is known about its chemical properties. Only the (III) [[oxidation state]] of the element app...
62: *[http://periodic.lanl.gov/elements/100.html Los Alamos National Laborat... - Francium (5138 bytes)
132: ...fore knowledge of the properties of this element only comes from radiochemical procedures.
134: ...mber of pictures of francium have been taken but only of at the most 200,000 atoms at a time. The pict...
137: *[http://periodic.lanl.gov/elements/87.html Los Alamos National Laborato... - 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... - Hydrogen (20221 bytes)
113: ...omic gas, H<sub>2</sub>, with a boiling point of only 20.27 [[Kelvin|K]] and a melting point of 1...
144: ...[[quantum mechanics]] the electron is allowed to only be at very specific distances from the proton. M...
162: ... air. Deuterium oxide, or D<sub>2</sub>O, is commonly referred to as [[heavy water]]. Hydrogen also fo...
184: Hydrogen is the only element that has different names for its isotope...
185: ...[[radon]], has a name that originally applied to only one of its isotopes.) - Lithium (11359 bytes)
134: ... is the lightest metal and has a density that is only half that of [[water]]. Like all alkali metals,...
141: ...rugs. Useful amounts of Lithium for this use are only slightly lower than toxic amounts, so that the b...
178: *[http://periodic.lanl.gov/elements/3.html Los Alamos National Laborator... - Aluminium (26079 bytes)
66: ...s]] (although its [[electrical conductivity]] is only 60% that of [[copper]], it's lighter in weight a...
70: *[[Powder]]ed aluminium is commonly used for [[silvering]] in [[paint]]. Aluminium f...
82: ... ordinary clay. He also assured the Emperor that only he, himself, and the Gods knew how to produce th...
97: ... its oxide is an extremely stable compound that, unlike rust on steel, does not flake off. The very re...
99: ...mounts of [[electricity]]; recycling it requires only 5% of the energy to produce it. A common practic... - Polonium (10219 bytes)
95: ...ce dissolves readily in dilute [[acid]]s, but is only slightly [[solubility|soluble]] in [[alkali]]s. ...
99: ... other places. However beta sources are more commonly used and are less dangerous.
123: ...rie), which is equivalent to a particle weighing only 6.8 x 10<sup>-12</sup> gram. Weight for weight p...
126: *[http://periodic.lanl.gov/elements/84.html Los Alamos National Laborato... - Atomic number (2054 bytes)
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