https://peda.net/id/9488124a787 2017-08-03T21:48:48+03:00 https://peda.net/:static/532/peda.net.logo.bg.svg <div class="license">Tämän sivun lisenssi <a rel="license nofollow ugc noopener" href="http://creativecommons.org/licenses/by-nc-sa/3.0/">Creative commons CC BY-NC-SA 3.0</a></div> https://peda.net/id/d483e022787 2018-01-30T08:13:39+02:00 <img src="https://upload.wikimedia.org/wikipedia/commons/thumb/c/c3/Liquid_oxygen_in_a_beaker_4.jpg/800px-Liquid_oxygen_in_a_beaker_4.jpg" alt="A transparent beaker containing a light blue fluid with gas bubbles"/><br/> Liquid oxygen boils at −183 <span>°C, producing colourless oxygen gas.<br/> <span class="center medium"><a href="https://peda.net/p/janne.rytkonen/bilingual-chemistry/ptoe/groups/group-vi-oxygen/o-oxygen-happi/c#top" title="C2F037A6-366D-44F8-B51E-BE81AE854E3A.jpeg"><img src="https://peda.net/p/janne.rytkonen/bilingual-chemistry/ptoe/groups/group-vi-oxygen/o-oxygen-happi/c:file/photo/f1d6ae098abcf305aebd3105685a52f45a847420/C2F037A6-366D-44F8-B51E-BE81AE854E3A.jpeg" alt="" title="C2F037A6-366D-44F8-B51E-BE81AE854E3A.jpeg" class="inline" loading="lazy"/></a></span><br/> <img src="https://upload.wikimedia.org/wikipedia/commons/thumb/d/d0/Wisoff_on_the_Arm_-_GPN-2000-001069.jpg/800px-Wisoff_on_the_Arm_-_GPN-2000-001069.jpg"/><br/> Space programs use pure oxygen O₂ instead of our everyday atmoshere mix of nitrogen and several other gases.<br/> <br/> <img src="https://upload.wikimedia.org/wikipedia/commons/thumb/9/9b/Apollo_1_fire.jpg/1024px-Apollo_1_fire.jpg" alt="The inside of a small spaceship, charred and apparently destroyed."/><br/> As pure oxygen O₂ is highly reactive, a spark lit Apollo 1 and its crew in the sky.</span> 2017-08-03T21:37:39+03:00 https://peda.net/id/1ec22194787 2017-08-06T10:29:40+03:00 <img src="https://upload.wikimedia.org/wikipedia/commons/2/2e/Sulfur.jpg" alt="Sulfur.jpg"/><br/> Sulfur crystal.<br/> <br/> <img src="https://upload.wikimedia.org/wikipedia/commons/1/13/S%C3%ADra.PNG"/><br/> Sulfur powder.<br/> <br/> Causes the smell of rotten eggs by forming <a href="https://peda.net/p/janne.rytkonen/bilingual-chemistry/goc/hhs#top" class="uuid-d1970c72-7a78-11e7-9bd1-eaecf9f45fbc">H2S, hydrogen sulfide</a>.​ 2017-08-03T21:39:45+03:00 https://peda.net/id/bce58dea7a7 2017-08-06T10:40:34+03:00 <span>The oxygen group is the 6th column in the periodic table, which means these elements need two electrons more for their valence shell. This means that they are quite reactive, like the elements of <a href="https://peda.net/p/janne.rytkonen/bilingual-chemistry/ptoe/groups/2gaem#top" class="uuid-2dee898e-7874-11e7-b9e1-d102fbf45fbc">Group II: Alkaline earth metals</a>​</span><span>​.</span> <ul> <li>nonmetals</li> <li>reactive <ul> <li>form ions of charge 2−</li> </ul> </li> <li>form toxic compounds with <a href="https://peda.net/p/janne.rytkonen/bilingual-chemistry/ptoe/groups/alkali-metals/h-hydrogen-vety#top" class="uuid-03ae82be-7879-11e7-a1ef-d102fbf45fbc">H, hydrogen (vety)</a>​ <ul> <li>except for <a href="https://peda.net/p/janne.rytkonen/bilingual-chemistry/goc/h2o-water#top" class="uuid-ab162ec6-7a77-11e7-adce-eaecf9f45fbc">H2O, water</a>​</li> </ul> </li> </ul> 2017-08-06T10:20:34+03:00