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  • curprev 18:1318:13, 26 June 2025 KandisFlood5 talk contribs 1,337 bytes +1,337 Created page with "For human beings breathable air consists of a ratio of oxygen to some inert gas (on earth it is nitrogen). The typical concentration is about 1/5th oxygen and 3<br>Read more<br><br><br><br><br><br><br><br><br><br>[https://www.fool.com/search/solr.aspx?q=Science Science]<br><br><br><br><br><br><br><br><br>What model is used to study atoms?<br><br>Asked by Wiki User<br><br><br><br>The Bohr model helps us understand the way that quantum mechanics determines different energy..."