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- Actinium (7046 bytes)
133: ...n the dark with an eerie blue light. It is found only in traces in uranium ores as 227-Ac, an [[alpha ...
146: ...nd in trace amounts in uranium ore, but more commonly is made in milligram amounts by the neutron irra...
161: *[http://periodic.lanl.gov/elements/89.html Los Alamos National Laborato... - Heart (10132 bytes)
17: ...sure. As the right ventricle needs to pump blood only to the lungs, it requires less muscle.
28: ...[[Heart sound|beating sounds of the heart]], commonly referred to as the "lub-dub" sound. - Mercury (planet) (22924 bytes)
1: ...was [[Mariner 10]] ([[1974]]–[[1975|75]]); only 40–45% of the planet has been mapped.
9: ===Temperature and sunlight===
10: ...adiation]]; not [[climate]] or [[season]]). The sunlight on Mercury's surface is 6.5 times as intense ...
28: ...ls 42% of the planetary [[volume]] (Earth's core only fills 17%). Surrounding the core is a 600 km [[m...
36: ... also remarkable in that it has an axial tilt of only 0.01 degrees, which is over 300 times smaller th... - Polar bear (6417 bytes)
18: ... [[Optical fiber|fibre-optic]] properties, a commonly perpetuated [[urban legend]].
20: ...ith [[infrared camera]] they are barely visible. Only the pads of their feet emit detectable heat.
22: ...vorous member of the [[bear]] family and feeds mainly on [[seal (mammal)|seal]]s. Polar bears are exce...
24: Polar bears are believed to be threatened, not mainly by [[hunting]], but by [[habitat loss]] caused b...
26: ... the bear to help it stay warm during the cold, sunless [[winter]]s. Measurements show, however, that ... - Nutrition (42689 bytes)
10: ...bsorbed matter is excreted in the [[feces]]. But only a minimal amount of digestive juice is eliminate...
14: ...ate and the post-digestion state. The effect may only be discernible after an extended period of time ...
24: ===Antiquity through Enlightenment===
35: ... [[François Magendie]] discovers that dogs fed only [[carbohydrates]] and [[fat]] lost their body [[...
79: ...cagon and other hormones to varying degrees, not only the amount of omega-3 versus omega-6 eaten but a... - Tobacco smoking (36030 bytes)
10: ...rm to refuse, except in the cases where there is only one cigarette left, or if the pack of cigarettes...
48: ...y found that tobacco grown in [[India]] averaged only 0.09 pCi per gram of polonium 210, whereas tobac...
61: ...r's disease", it stated, noting that smokers are only half as likely as non-smokers to survive to the ...
66: ...s of introducing it into the bloodstream, second only to injection, which allows for the rapid feedbac...
77: ...00 of the study participants are still alive and only 134 of them still smoke. - Tangram (4661 bytes)
- Atomic mass (3063 bytes)
- Sword (24928 bytes)
27: ...pathas were decorated with Germanic artwork (not unlike the Germanic [[bracteate]]s fashioned after Ro...
29: ...]] remains essentially stable, with variations mainly concerning the shape of the [[pommel]]. These sw...
63: ...y and later construction). This occurs most commonly in decorative replicas, or cheap [[sword-like ob...
65: * In a "full" tang (most commonly used in knives and machetes) the tang has about ...
146: ...eries of elements in a problem in order to leave only those with proven relevance, for example. - Americium (6956 bytes)
135: *[http://periodic.lanl.gov/elements/95.html Los Alamos National Laborato... - Berkelium (5697 bytes)
88: ...] by [[Glenn T. Seaborg]], [[Albert Ghiorso]], Stanley G. Thompson, and Kenneth Street, Jr at the [[Un...
94: *[http://periodic.lanl.gov/elements/97.html Los Alamos National Laborato... - Boron (9084 bytes)
94: *[http://periodic.lanl.gov/elements/5.html Los Alamos National Laborator... - Caesium (11026 bytes)
151: ...ercury (element)|mercury]], caesium is among the only metals that are liquid at or near room [[tempera...
180: ...ement has the largest number of isotopes, it has only one naturally occurring stable [[isotope]], Cs-1...
190: *[http://periodic.lanl.gov/elements/55.html Los Alamos National Laborato... - Curium (8593 bytes)
179: The [[isotope]] curium-248 has been synthesized only in milligram quantities, but curium-242 and curi...
192: * [http://periodic.lanl.gov/elements/96.html Los Alamos National Laborato... - Germanium (8776 bytes)
165: ... for [[semiconductor]]s that have an impurity of only one part in 10<sup>10</sup>.
197: Unlike most semiconductors, germanium has a small [[b...
201: The alloy Silicon germanide (commonly referred to as "silicon-germanium", or [[SiGe]])...
220: *[http://periodic.lanl.gov/elements/32.html Los Alamos National Laborato... - Gold (24329 bytes)
156: ...ted and blue light to be absorbed. It is one of only three metals which have an actual easily-identif...
250: There is only one stable [[isotope]] of gold, and 18 [[radiois...
256: *[http://periodic.lanl.gov/elements/79.html Los Alamos National Laborato... - Hafnium (9162 bytes)
160: ... are amongst the most difficult to separate. The only notable difference between them is their density...
188: *[http://periodic.lanl.gov/elements/72.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... - Indium (8657 bytes)
138: ...his radioactivity is not considered hazardous, mainly because its decay rate is nearly 50,000 times sl...
153: Indium is produced mainly from residues generated during [[zinc]] [[ore]] ...
155: Up until [[1924]], there was only about a [[gram]] of isolated indium on the plane...
162: *[http://periodic.lanl.gov/elements/49.html Los Alamos National Laborato... - Iodine (11416 bytes)
142: ...carbon disulfide to form purple solutions (It is only slightly [[solubility|soluble]] in water). The d...
145: ...little iodine in the diet—typically remote inland
156: ...too unstable to be used commercially, but is commonly used in college [[prank]]s
168: There are thirty [[isotope]]s of iodine and only one, I-127, is stable. The artificial [[radioiso...
172: ...lic, and occurs in multiple [[ion]]ic forms (commonly, I- and iodate) which have different chemical be...
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