https://peda.net/id/cb692e20787 2017-08-03T21:49:07+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/7f17852a787 2017-09-14T08:05:03+03:00 <img src="https://upload.wikimedia.org/wikipedia/commons/1/1c/Helium_amp.jpg" alt="Helium amp.jpg"/><br/> <br/> <br/> <img src="https://upload.wikimedia.org/wikipedia/commons/7/75/Balloons-41362.png" alt="Balloons-41362.png"/> 2017-08-03T21:42:26+03:00 https://peda.net/id/e1ee0afc787 2017-08-05T20:06:18+03:00 <img src="https://upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Is_Open.jpg/796px-Is_Open.jpg" alt="File:Is Open.jpg"/><br/> Neon, when exposed to an electric current, produces a lighting effect apparent in neon signs. 2017-08-03T21:45:12+03:00 https://peda.net/id/eb1858c6787 2017-08-05T20:06:28+03:00 <span>A sample is hard to find these days, it seems.</span> 2017-08-03T21:45:27+03:00 https://peda.net/id/03ceb2d4787 2017-08-05T20:06:36+03:00 <img src="https://upload.wikimedia.org/wikipedia/commons/thumb/7/76/Three_xenon_flashtubes_and_a_krypton_arc_lamp.jpg/1280px-Three_xenon_flashtubes_and_a_krypton_arc_lamp.jpg" alt="Three xenon flashtubes and a krypton arc lamp.jpg"/><br/> A krypton (bottom) and xenon flashtubes. 2017-08-03T21:46:09+03:00 https://peda.net/id/234cef72787 2017-08-05T20:06:44+03:00 <img src="https://upload.wikimedia.org/wikipedia/commons/thumb/2/26/Nokia_N8_%28rear_view%29.jpg/1280px-Nokia_N8_%28rear_view%29.jpg"/>A xenon flashtube as seen on a Nokia phone. 2017-08-03T21:47:02+03:00 https://peda.net/id/956e63ea7a9 2017-08-06T13:56:56+03:00 The noble gases are the 8th and final column in the periodic table, which means they have a full valence shell. This means that noble gases rarely react, with few exception to the rule. <br/> <ul> <li>nonmetals</li> <li>gases</li> <li>odourless</li> <li>inert, or not reactive</li> <ul> <li>except with highly reactive elements, like <a href="https://peda.net/p/janne.rytkonen/bilingual-chemistry/ptoe/groups/group-vii-fluorine/fff#top" class="uuid-2c414cc8-787b-11e7-9e7b-eaecf9f45fbc">F, fluorine (fluori)</a>​</li> </ul> <li>monatomic as gases</li> </ul> 2017-08-06T13:54:12+03:00