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1. Marie Curie (5862 bytes)
   2: ...te]]. She founded the [[Curie Institute|Curie Institutes]] in [[Paris]] and in [[Warsaw]].
   5: ...ed as a governess for several years. Eventually, with the monetary assistance of her elder sister, she...
   7: ...ive than uranium; thus on [[December 26]]th Marie Curie announced the existence of this new substance.
   9: ...r was named [[radium]] from its intense radioactivity.
   11: ...e [[Nobel Prize in Physics]], [[1903]]: "in recognition of the extraordinary services they have render...

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1. Marie Curie (5862 bytes)
   2: ...te]]. She founded the [[Curie Institute|Curie Institutes]] in [[Paris]] and in [[Warsaw]].
   5: ...ed as a governess for several years. Eventually, with the monetary assistance of her elder sister, she...
   7: ...ive than uranium; thus on [[December 26]]th Marie Curie announced the existence of this new substance.
   9: ...r was named [[radium]] from its intense radioactivity.
   11: ...e [[Nobel Prize in Physics]], [[1903]]: "in recognition of the extraordinary services they have render...
2. Age of the Earth (20052 bytes)
   1: ...ation of the Ca-Al-rich inclusions and the meteorites. Since the accretion time of the Earth is not e...
   6: ... the Earth and [[universe]] had existed from eternity.
   11: ...embled the Earth in composition and then measured its rate of cooling. This led him to estimate that t...
   13: ...at the Earth had been through many changes during its existence, however long that might be.
   15: ...ffering locations contained similar fossils, then it was very plausible that the layers were the same ...
3. Earth (30908 bytes)
   4: ...nce in here. It's been done to death. Find a gem with which to improve the article and you'll shine fo...
   7: ...d its single [[natural satellite]], the [[Moon]]. Its dominant [[Sentience|sentient species]] is the [...
   9: Its symbol consists of a circled cross, representing...
   14: ...sea level). Thus the Earth is an oblate spheroid within a [[tolerance (engineering)|tolerance]] of one...
   17: ...osphere|magnetic field]] due to the convection of its electrically conductive material.
4. List of chemists (10401 bytes)
   11: *[[Amedeo Avogadro]], (1776-1856), Italian physicist
   31: *[[Maria Sklodowska-Curie|Maria Skłodowska-Curie]], (1867-1934), Polish-born French radiation phys...
   32: *[[Pierre Curie]], (1859-1906)
   56: ... Emil Fischer]], (1852-1919), not to be confused with :
   66: ...ham (chemist)|Thomas Graham]] not to be confused with:
5. Wilhelm Conrad Roentgen (8624 bytes)
   2: ...y|German]] [[physics|physicist]], of the [[University of Würzburg]], who, on [[November 8]], [[1895]]...
   6: ...eachers, a "[[crime]]" he claimed not to have committed.
   8: ... [[Doctor of Philosophy|Ph.D.]] from the [[University of Zurich]].
   12: ... believed his carcinoma was a result of his work with ionizing radiation because his investigations we...
   16: ...minium window. It occurred to Röntgen that the Hittorf-Crookes tube, which had a much thicker glass ...
6. March 17 (9666 bytes)
   6: ...ar]] defeats the [[Pompey|Pompeian]] forces of [[Titus Labienus]] and [[Gnaeus Pompeius|Pompey the You...
   9: ...[St. Patrick's Day]] is celebrated in [[New York City]] for the first time (at the Crown and Thistle T...
   10: ...ashington]] places [[artillery]] overlooking the city.
   11: ...ingdom of Italy (Napoleonic)|Kingdom of Italy]], with Napoleon as King.
   13: *[[1861]] - The Kingdom of [[Italy]] is proclaimed.
7. Cobalt (13481 bytes)
   1: <!-- Here is a table of data; skip past it to edit the text. -->
   16: ...es]] </td><td>[[transition metal]]s</td></tr>
   20: <td>[[Density]], [[Mohs hardness scale|Hardness]] </td><td>...
   22: ... </td><td align="center">metallic with grey tinge<br>[[Image:Co,27.jpg|125px|]]</td></t...
   45: ... </td><td>1768 [[Kelvin|K]] (2723 ?[[Fahrenheit|F]])</td></tr>
8. Curium (8593 bytes)
   1: <!-- Here is a table of data; skip past it to edit the text. -->
   43: ...⁷ 6[[d-orbital|d]]¹ 7[[s-orbital|s]]²
   53: | [[Density]]
   60: | 1613 [[Kelvin|K]] (2444 [[Fahrenheit|?F]])
   86: | [[Velocity of sound]]
9. Francium (5138 bytes)
   20: ...ment|1(IA)]], [[period 7 element|7]], [[atomic orbital|s]]
   22: | [[Density]], [[Mohs hardness scale|Hardness]]
   31: | (223.0197307) [[Atomic mass unit|amu]]
   60: | 300.2 [[Kelvin|K]] (80.53 ?[[Fahrenheit|F]])
   82: | [[Electronegativity]]
10. Gadolinium (9860 bytes)
    1: <!-- Here is a table of data; skip past it to edit the text. -->
    24: | [[Density]], [[Mohs hardness scale|Hardness]]
    28: | align="center" | silvery white<br>[[Image:Gd,64.jpg|125px|]]
    62: | 1585 [[Kelvin|K]] (2394 [[Fahrenheit|?F]])
    79: | [[Velocity of sound]]
11. Polonium (10219 bytes)
    1: <!-- Here is a table of data; skip past it to edit the text. -->
    21: <td>[[Density]], [[Mohs hardness scale|Hardness]] </td><td>...
    27: ... </td><td>[209] [[unified atomic mass unit|u]]</td></tr>
    35: ...up>14</sup> 5[[d-orbital|d]]¹⁰ 6[[s-orbital|s]]² 6p⁴</td></tr>
    46: ... </td><td>527 [[Kelvin|K]] (489 ?[[Fahrenheit|F]])</td></tr>
12. Radon (12616 bytes)
    1: <!-- Here is a table of data; skip past it to edit the text. -->
    23: | [[Density]], [[Mohs hardness scale|Hardness]]
    32: | [222] [[Atomic mass unit|amu]]
    44: ...up>14</sup> 5[[d-orbital|d]]¹⁰ 6[[s-orbital|s]]² 6p⁶
    61: | 202 [[Kelvin|K]] (-96 ?[[Fahrenheit|F]])
13. Radium (13138 bytes)
    18: ...ent|2(IIA)]], [[period 7 element|7]], [[atomic orbital|s]]</td></tr>
    20: <td>[[Density]], [[Mohs hardness scale|Hardness]]</td><td>5000...
    22: <td>[[color|Appearance]]</td><td>Silvery white metallic</td></tr>
    26: ...tomic weight]]</td><td>(226.0254) [[Atomic mass unit|amu]]</td></tr>
    45: ...point]]</td><td>973 [[Kelvin|K]] (1292 ?[[Fahrenheit|F]])</td></tr>
14. Neutron (7687 bytes)
    22: <tr><td>[[Quark]] composition: </td><td>2 Down, 1 Up</td></tr>
    26: ... a [[proton]]). Its [[spin (physics)|spin]] is ?. Its [[antiparticle]] is called the '''antineutron'''...
    32: ... of 886 seconds (about 15 minutes), decaying by emitting an [[electron]] and [[neutrino|antineutrino]]...
    34: ...eir discovery, makes them very penetrating, makes it impossible to observe them directly, and makes th...
    36: ...y unchecked until it makes a "head-on" collision with an atomic nucleus. Since nuclei have a very smal...
15. Timeline of chemical element discovery (10490 bytes)
    5: ==Antiquity==
    6: * antiquity - [[Carbon]]
    7: * antiquity - [[Gold]]
    8: * antiquity - [[Silver]]
    9: * antiquity - [[Copper]]
16. Magnet (13875 bytes)
    4: ...of [[magnetite]] have been discovered since antiquity.
    6: ...et is any material that has a [[magnetic field]]. It can be in the form of a permanent magnet or an [[...
    12: ... matter contains huge numbers of these particles, it would be expected that all matter would be magnet...
    14: ... of these spins ''between'' atoms and molecules. Without long range ordering, there is no net magnetic...
    16: ...eal of order. The greater the degree of ordering within and between domains, the greater the resulting...
17. History of chemistry (8174 bytes)
    2: ... '''history of chemistry''' may be said to begin with the distinction of [[chemistry]] from [[alchemy]...
    6: ==The vitalism debate and organic chemistry==
    8: ...[oxygen]]) was settled, another dispute, about [[vitalism]] and the essential distinction between orga...
    14: ...n to investigate the internal structure of atoms with his theory of [[ion|ionization]]. This was carr...
    20: ... the same properties that Mendeleev predicted for it.
18. Physics (25628 bytes)
    4: ...ology]], [[chemistry]], [[geology]], etc.) deals with particular types of material systems that obey t...
    6: ...stract patterns that need not have any bearing on it. However, the distinction is not always clear-cut...
    12: ..., most individual physicists have specialized in either [[theoretical physics]] or [[experimental phys...
    15: ...n go in the wrong direction; this is one of the criticisms that have been levelled against [[M-theory]...
    19: ...asically correct, within a certain domain of validity. For instance, the theory of [[classical mechani...
19. 1901 (12292 bytes)
    17: * [[January 1]] - The British colonies of [[New South Wales]], [[Queensland]...
    18: ...ry 1]] - [[Nigeria]] becomes a [[United Kingdom|British]] protectorate
    21: ... Kingdom]], dies. His own son [[George V of the United Kingdom | Prince George]], [[Duke of York]] bec...
    22: ...ary 20]] - The legislature of [[Hawaii|Hawaii Territory]] convenes for the first time.
    23: ...ruary 25]] - [[J.P. Morgan]] incorporates the [[United States Steel Corporation]].

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