https://peda.net/id/a4470f92787 2017-08-03T21:49:00+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/2c414cc8787 2017-08-05T20:05:23+03:00 <span>A sample is hard to find these days, it seems.</span> 2017-08-03T21:40:07+03:00 https://peda.net/id/3e9ef2a8787 2017-08-06T10:04:22+03:00 Used to be used for sanitizing pools.<br/> <br/> <img src="https://upload.wikimedia.org/wikipedia/commons/9/9d/Chlor_1a.jpg" alt="Chlor 1a.jpg"/><br/> Liquid chlorine.<br/> <br/> <img src="https://upload.wikimedia.org/wikipedia/commons/a/a2/Chlorine2.jpg" alt="Chlorine2.jpg"/><br/> Gaseous chlorine. 2017-08-03T21:40:38+03:00 https://peda.net/id/5b95f41a787 2017-08-05T20:05:41+03:00 <img src="https://upload.wikimedia.org/wikipedia/commons/a/ac/Bromine.jpg" alt="Bromine.jpg"/><br/> Liquid bromine and evaporated, gaseous bromine. 2017-08-03T21:41:27+03:00 https://peda.net/id/6c4d8c46787 2017-09-02T08:36:56+03:00 <img src="https://upload.wikimedia.org/wikipedia/commons/7/7c/Iod_kristall.jpg" alt="Iod kristall.jpg"/><br/> Solid iodine crystal. Used in hospital disinfectants, like <a href="https://peda.net/p/janne.rytkonen/bilingual-chemistry/goc/c-ip#top" class="uuid-8dc6913e-7ab9-11e7-bf64-eaecf9f45fbc">Povidone-iodine</a>​. It <a href="http://www.hs.fi/ulkomaat/art-2000005350569.html" rel="nofollow ugc noopener">can also prevent</a> certain types of cancer caused by radioactive radiation. 2017-08-03T21:41:55+03:00 https://peda.net/id/f140611e7a7 2017-08-06T18:12:22+03:00 The halogen group is the 7th column in the periodic table, which means halogens need a single electron more for their valence shell. This means that all halogens are highly reactive, like the elements of<a href="https://peda.net/p/janne.rytkonen/bilingual-chemistry/ptoe/groups/alkali-metals#top" class="uuid-09c13d2c-7874-11e7-9e1a-eaecf9f45fbc">Group I: Alkali metals</a>​. Halogens can even react with their containers, 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>​ does with glass bottles. <ul> <li>nonmetals</li> <li>feature solids, liquids and gases</li> <li>highly reactive <ul> <li>form ions of charge 1−</li> </ul> </li> <li>highly toxic, yet used as sanitizers <ul> <li><a href="https://peda.net/p/janne.rytkonen/bilingual-chemistry/ptoe/groups/group-vii-fluorine/cck#top" class="uuid-3e9ef2a8-787b-11e7-a985-d102fbf45fbc">Cl, chlorine (kloori)</a>​ in pools</li> <li><a href="https://peda.net/p/janne.rytkonen/bilingual-chemistry/goc/c-ip#top" class="uuid-8dc6913e-7ab9-11e7-bf64-eaecf9f45fbc">Povidone-iodine</a>​ in hospitals</li> </ul> </li> <li>diatomic as gases</li> </ul> 2017-08-06T09:46:15+03:00