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1. Actinium (7046 bytes)
   26: | 10070 [[kilogram per cubic metre|kg/m³]], n/a
   77: | unknown [[joule per kilogram-kelvin|J/(kg*K)]]
   110: | ²²¹[[francium|Fr]]
   119: | α || 5.536 || ²²²[[francium|Fr]]
   125: | α || 5.042 || ²²³[[francium|Fr]]
2. Heart (10132 bytes)
   3: ...he term ''cardiac'' means "related to the heart", from the [[Greek language|Greek]] ''kardia'' (&kappa...
   7: ...e [[lung]]s. In adults, it weighs about 300-350 [[gram|g]]. It consists of four chambers, the two upper ...
   9: ...maintain coordinated unidirectional flow of blood from the atria to the ventricles.
   13: ...art_labelled_large.png|thumb|250px|left|Anterior (frontal) view of the opened heart. White arrows indi...
   15: ... through [[pulmonary vein]]s to the left atrium. From the left atrium this newly oxygenated blood pas...
3. Mercury (planet) (22924 bytes)
   1: ...st planet in the [[Solar System]]. Mercury ranges from −0.4 to 5.5 in [[apparent magnitude]]; Me...
   8: (This Data comes from [http://www.answers.com/topic/mercury-in-roman-...
   10: ...[temperature]] of Mercury is 452 K, but it ranges from 90–700 K; by comparison, the temperature ...
   12: ...posited by [[comet]] impacts and/or gases arising from the planetary interior.
   98: | 3.302&times;10²³ [[kilogram|kg]]<br>(0.055 Earths)
4. Polar bear (6417 bytes)
   15: ...600 to 700 [[gram|g]]. Population estimates range from 16,000 to 35,000, with about 60% in [[Canada]].
   20: ...ulation is so effective that when viewed with [[infrared camera]] they are barely visible. Only the pa...
   22: ...mers]] and can often be seen in open waters miles from land. This may be a sign that they have begun [...
   41: ...m.com/ The Polar Bear Cam], live video and images from the polar bear migration near [[Churchill, Mani...
5. Nutrition (42689 bytes)
   4: Between the extremes of optimal health and death from [[starvation]] or [[malnutrition]], there is an...
   10: ...hough the digestive process helps to release them from the matrix of the foods where they occur. Any u...
   16: ...re hormonally and metabolically favourable than infrequent, haphazard food intake.
   20: ... Early diets were primarily [[vegetarian]] with infrequent game meats and fish where available.
   27: ...ard reluctantly agreed to a trial. Daniel and his friends received their diet for 10 days and were the...
6. Tobacco smoking (36030 bytes)
   10: ...ter or match. One of the most common favors asked from a stranger is for a light; it is also done as a...
   15: ...ury]], tobacco smoking was brought to Europe, and from there spread to the rest of the world.
   17: ...rtrayed in advertising as part of a glamorous carefree lifestyle. This image continued to be prevalent...
   37: ... he was usually seen to have a cigar clamped, was frequently remarked upon by the press and public.
   39: ...ins. However, the practice of ingesting the smoke from a smoldering leaf generates an enormous number ...
7. Tangram (4661 bytes)
   1: '''Tangram''' is an ancient [[China|Chinese]] [[puzzle]].
   4: [[Image:Tangram diagram.png]]
   9: * 1 [[parallelogram]]
   14: ...em]] was discovered in the Orient with help of Tangram pieces.
   16: The puzzler [[Sam Loyd]] devised many tangram puzzles.
8. Atomic mass (3063 bytes)
   5: ... pattern in the amounts the atomic masses deviate from their mass numbers is as follows: the deviatio...
   7: ...f the element's atoms, often referred to as the [[gram atomic mass]] or [[molar mass]].
   15: ...efore one mole of iron atoms has a mass of 55.847 grams.
9. Sword (24928 bytes)
   2: ...h German]] ''Schwert'', literally "wounding tool" from a [[Proto-Indo-European language|Proto-Indo-Eu...
   8: [[Image:Sword of Gou Jian.jpg|frame|[[Sword of Gou Jian]] as seen on a Chinese hig...
   10: ...opotamia]]. Swords from the [[Nordic Bronze Age]] from ca. [[1400 BC]] show characteristic spiral patt...
   11: Sword production in [[China]] is attested from the Bronze Age [[Shang Dynasty]].
   14: [[Iron]] swords became increasingly common from the [[13th century BC]]. The [[Hittites]], the...
10. Americium (6956 bytes)
    50: | 13700 [[kilogram per cubic metre|kg/m³]]
    123: ...m-241 is approximately three times [[radium]]. [[Gram]] quantities of Am-241 emit intense [[gamma ray]]...
    126: This element can be produced in [[kilogram]] amounts and has some uses (mostly Am-241 since ...
    132: ... isotopes of americium range in [[atomic weight]] from 231.046 [[atomic mass unit|amu]] (Am-231) to 24...
11. Berkelium (5697 bytes)
    83: ...]] were isolated that weighed 3 billionths of a [[gram]]. This was the first time visible amounts of a p...
    88: ...berkelium-243 ([[half-life]] 4.5 hours) and two [[free neutron]]s. One of the longest lived [[isotope]...
    91: ... isotopes of berkelium range in [[atomic weight]] from 235.057 [[atomic mass unit|amu]] (Bk-235) to 25...
12. Boron (9084 bytes)
    44: ...conductor in room temperatures. It is never found free in nature.
    49: ... of this element include the transmittance of [[infrared]] light. At standard temperatures boron is a ...
    71: ...common salts. Borax glazes were used in [[China]] from 300 AD, and boron compounds were used in glassm...
    78: Economically important sources are from the [[ore]] rasorite (kernite) and tincal (bora...
    82: ... [[gram]] and amorphous boron cost about US$2 per gram.
13. Caesium (11026 bytes)
    6: ...nter" | [[Rubidium|Rb]]<br>'''Cs'''<br>[[Francium|Fr]]&nbsp;&nbsp;<br>&nbsp;<br>&nbsp;
    23: | 1879 [[kilogram per cubic metre|kg/m³]], 0.2
    86: | 240 [[joule per kilogram-kelvin|J/(kg&middot;K)]]
    149: ...e non-radioactive alkali metals. (Technically, [[francium]] is the least common alkali metal, but sin...
    167: ...stav Kirchhoff]] in [[1860]] in [[mineral water]] from D?m, Germany. Its identification was based upon...
14. Curium (8593 bytes)
    54: | 13510 [[kilogram per cubic metre|kg/m³]]
    179: ...s, but curium-242 and curium-244 are made in multigram amounts, which allows for the determination of so...
    181: ...rate around 2 [[watt]]s of thermal [[energy]] per gram. It is used in [[pacemaker]]s, remote navigationa...
    186: ...es. Curium-242 ([[half-life]] 163 days) and one [[free neutron]] were made by bombarding [[alpha parti...
    189: ...The isotopes of curium range in [[atomic weight]] from 233.051 [[atomic mass unit|amu]] (Cm-233) to 2...
15. Germanium (8776 bytes)
    27: | 5323 [[kilogram per cubic metre|kg/m³]], 6
    90: | 320 [[joule per kilogram-kelvin|J/(kg*K)]]
    194: ...ium in [[fiber optics]] communication networks, infrared [[night vision]] systems, and polymerization ...
    197: ...ectors. Its oxide's [[refractive index|index of refraction]] and dispersion properties make germanium ...
    199: ...he distinctive character of [[Fuzzbox|fuzzboxes]] from the early [[Rock and roll]] era.
16. Gold (24329 bytes)
    27: | 19300 [[kilogram per cubic metre|kg/m³]], 2.5
    91: | 128 [[joule per kilogram-kelvin|J/(kg?K)]]
    156: ... These colors are the result of gold's [[plasmon frequency]] lying in the visible range, which causes...
    158: ...[[ductility|ductile]] [[metal]] known; a single [[gram]] can be beaten into a sheet of one [[square mete...
    162: ...] and dissolves allowing the gold to be displaced from solution and be recovered as a solid precipitat...
17. Hafnium (9162 bytes)
    24: | 13310 [[kilogram per cubic metre|kg/m³]], 5.5
    32: | 178.49 [[gram|g]]/[[mole (unit)|mol]]
    87: | 140 [[joule per kilogram-kelvin|J/(kg*K)]]
    162: ... compound known and hafnium nitride is the most refractory of all known metal nitrides with a [[meltin...
    174: ... is considerable scientific opposition to this program, both on technical and moral grounds (the argumen...
18. Helium (36603 bytes)
    27: | 0.1785 [[gram|g]]/[[litre|L]]
    41: | 5193 [[joule|J]]/([[kilogram|kg]]&middot;[[kelvin|K]])
    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...
19. Indium (8657 bytes)
    25: | 7310 [[kilogram per cubic metre|kg/m³]], 1.2
    88: | 233 [[joule per kilogram-kelvin|J/(kg?K)]]
    133: ...ary application is to form transparent electrodes from [[Indium tin oxide]] in [[liquid crystal displa...
    153: ...e]] [[mining]] concerns stopped extracting indium from their [[zinc]] tailings. In 2002, the price wa...
    155: Up until [[1924]], there was only about a [[gram]] of isolated indium on the planet. The Earth is ...
20. Iodine (11416 bytes)
    26: | 4940 [[kilogram per cubic metre|kg/m³]], no data
    34: | 126.90447 [[gram|g]]/[[mole (unit)|mol]]
    89: | 145 [[joule per kilogram-kelvin|J/(kg&middot;K)]]
    139: '''Iodine''' (from the Gr. ''Iodes'', meaning "violet"), is a [[ch...
    142: ...with [[starch]] solution is characteristic of the free element.

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