https://peda.net/id/09c13d2c787 2017-08-03T21:48:03+03:00 https://peda.net/:static/535/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/03ae82be787 2017-08-05T20:01:35+03:00 <img src="https://upload.wikimedia.org/wikipedia/commons/thumb/8/83/Hydrogen_discharge_tube.jpg/1280px-Hydrogen_discharge_tube.jpg"/><br/> A discharge tube filled with hydrogen gas glows brightly. 2017-08-03T21:24:39+03:00 https://peda.net/id/6e0f4d8a787 2017-08-05T20:02:03+03:00 <img src="https://upload.wikimedia.org/wikipedia/commons/a/ae/Lithium_paraffin.jpg" alt="undefined"/><br/> Lithium in paraffin oil. 2017-08-03T21:06:10+03:00 https://peda.net/id/0c61593c787 2017-08-05T20:02:20+03:00 <img src="https://upload.wikimedia.org/wikipedia/commons/thumb/8/8c/Sodium.jpg/320px-Sodium.jpg" alt="Sodium.jpg"/><br/> Sodium in mineral oil. 2017-08-03T21:17:45+03:00 https://peda.net/id/dcfbe5fa787 2017-08-05T20:02:30+03:00 <img src="https://upload.wikimedia.org/wikipedia/commons/thumb/4/44/KaliumunterTetrahydrofuran.JPG/800px-KaliumunterTetrahydrofuran.JPG" alt="KaliumunterTetrahydrofuran.JPG"/><br/> Potassium in oxolan. 2017-08-03T21:09:16+03:00 https://peda.net/id/e4eae912790 2017-08-06T18:01:22+03:00 The alkali metal group is the 1st column in the periodic table, which means alkali metals have a single electron on their valence shell they wish to lose. This means that all alkali metals are highly reactive, as can be seen in the explosive reaction of sodium with water <a href="https://peda.net/p/janne.rytkonen/bilingual-chemistry/lab-basics/safety-labels/ess#top" class="uuid-1c901638-79fc-11e7-859c-eaecf9f45fbc">Experiment: Sodium soup</a>​. To prevent reactions with water vapour in the air, they must be stored submerged, like <a href="https://peda.net/p/janne.rytkonen/bilingual-chemistry/ptoe/groups/alkali-metals/lithium-li#top" class="uuid-6e0f4d8a-7876-11e7-8070-d102fbf45fbc">Li, lithium (litium)</a>​ in paraffin oil.<br/> <ul> <li>metals <ul> <li>except for the nonmetallic <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>​</li> </ul> </li> <li>soft</li> <li>low in density</li> <li>highly reactive <ul> <li>form ions of charge 1+</li> </ul> </li> <li>as compounds in nature</li> </ul> Under every-day conditions, <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>​ is a nonmetal, but <a href="http://www.independent.co.uk/news/science/hydrogen-metal-revolution-technology-space-rockets-superconductor-harvard-university-a7548221.html" target="_blank" rel="nofollow ugc noopener">under extreme conditions</a>, it exhibits metallic behaviour. 2017-08-04T15:17:33+03:00