https://croatianschoolsydney.com/index.php?action=history&feed=atom&title=Astat
Astat - Povijest promjena
2026-05-23T10:49:06Z
Povijest promjena ove stranice na wikiju
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WikiSysop: bnz
2022-04-15T01:05:54Z
<p>bnz</p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">←Starija inačica</td>
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Inačica od 01:05, 15. travnja 2022.</td>
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<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;"><!--'''Astat'''--></del>{{Kemijski_element</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>{{Kemijski_element</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>| ime = astat</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>| ime = astat</div></td></tr>
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WikiSysop
https://croatianschoolsydney.com/index.php?title=Astat&diff=14935&oldid=prev
WikiSysop: Bot: Automatski unos stranica
2021-07-26T09:25:53Z
<p>Bot: Automatski unos stranica</p>
<p><b>Nova stranica</b></p><div><!--'''Astat'''-->{{Kemijski_element<br />
| ime = astat<br />
| simbol = At<br />
| redni_broj = 85<br />
| kemijska_skupina = halogeni elementi<br />
| grupa = 17<br />
| perioda = 6<br />
| blok = p<br />
| gustoca = ?<br />
| tvrdoca = ?<br />
| taliste = 302 <ref name="Sebastian Blumentritt">Sebastian Blumentritt ''Periodensystem der Elemente'', 6. izd., Blume-Verlag, Münster (Savezna Republika Njemačka) 2012., {{ISBN|978-3-942-53009-5}}, str. 1</ref><br />
| vreliste = 370 <ref name="Sebastian Blumentritt">Sebastian Blumentritt ''Periodensystem der Elemente'', 6. izd., Blume-Verlag, Münster (Savezna Republika Njemačka) 2012., {{ISBN|978-3-942-53009-5}}, str. 1</ref><br />
| atomska_masa = 210<br />
| EK1 = ksenon<br />
| EK2 = Xe<br />
| e_konfiguracija = 4f<sup>14</sup>5d<sup>10</sup>6s<sup>2</sup>6p<sup>5</sup> <ref name="Sebastian Blumentritt">Sebastian Blumentritt ''Periodensystem der Elemente'', 6. izd., Blume-Verlag, Münster (Savezna Republika Njemačka) 2012., {{ISBN|978-3-942-53009-5}}, str. 1</ref><br />
}}<br />
<br />
'''Astat''' su [[1940.]] godine otkrili Emilio Gino Segre, Dale R. Corson i K. R. MacKenzie ([[SAD]]). Ime mu dolazi od grčke riječi ''astatos'' što znači nepostojan. To je radioaktivni element s kratkim vremenom [[poluraspad]]a (7,5 sati). Kemijski je sličan ostalim [[halogeni]]ma.<br />
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Stručnjaci pretpostavljaju da je sveukupna masa astata u prirodnom stanju u [[Zemljina kora|Zemljinoj kori]] nevjerojatnih '''0,26''' [[gram]]a.<br />
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==Izvori==<br />
{{izvori}}<br />
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{{wječnik}}<br />
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{{Kemijski elementi}}<br />
{{Mrva-kem-el}}<br />
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[[Kategorija:Kemijski elementi]]</div>
WikiSysop