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Flowing in every day, these data are added to the <a href="https://translate.google.com/website?sl=auto&tl=en&hl=en-GB&u=http://web.archive.org/">Wayback Machine</a> after an embargo period. </div> </div> <div style="display:inline-block;vertical-align:top;width:49%;"><span class="c-logo" style="background-image:url(https://archive.org/services/img/alexacrawls)"></span> <div> Collection: <a style="color:#33f;" href="https://translate.google.com/website?sl=auto&tl=en&hl=en-GB&u=https://archive.org/details/alexacrawls" target="_new"><span class="wm-title">Alexa Crawls</span></a> </div> <div style="max-height:75px;overflow:hidden;position:relative;"> <div style="position:absolute;top:0;left:0;width:100%;height:75px;background:linear-gradient(to bottom,rgba(255,255,255,0) 0%,rgba(255,255,255,0) 90%,rgba(255,255,255,255) 100%);"></div> Starting in 1996, <a href="https://translate.google.com/website?sl=auto&tl=en&hl=en-GB&u=http://www.alexa.com/">Alexa Internet</a> has been donating their crawl data to the Internet Archive. Flowing in every day, these data are added to the <a href="https://translate.google.com/website?sl=auto&tl=en&hl=en-GB&u=http://web.archive.org/">Wayback Machine</a> after an embargo period. </div> </div> </div> </div> <div id="wm-capinfo-timestamps"> <div style="background-color:#666;color:#fff;font-weight:bold;text-align:center" title="Timestamps for the elements of this page"> TIMESTAMPS </div> <div> <div id="wm-capresources" style="margin:0 5px 5px 5px;max-height:250px;overflow-y:scroll !important"></div> <div id="wm-capresources-loading" style="text-align:left;margin:0 20px 5px 5px;display:none"> <img src="/_static/images/loading.gif" alt="loading"> </div> </div> </div> </div> </div> </div> </div> <div id="wm-ipp-print"> The Wayback Machine - https://web.archive.org/web/20161119040940/http://antoine.frostburg.edu:80/chem/senese/101/intro/faq.shtml </div> <script type="text/javascript">//<![CDATA[ __wm.bt(725,27,25,2,"web","http://antoine.frostburg.edu/chem/senese/101/intro/faq.shtml","20161119040940",1996,"/_static/",["/_static/css/banner-styles.css?v=S1zqJCYt","/_static/css/iconochive.css?v=3PDvdIFv"], false); 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'https:' : 'http:') + '//web.archive.org/web/20161119040940/http://cse.google.com/cse.js?cx=' + cx; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(gcse, s); })(); </script><gcse:searchbox-only></gcse:searchbox-only><p></p><font face="geneva,Helvetica,Arial,sans-serif" size="-1"><b><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/faq.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB">FAQ</a></b></font><br> <table border="0" cellspacing="0" cellpadding="0"> <tbody> <tr> <td bgcolor="#9999bb" align="LEFT"><font face="geneva,Helvetica,Arial,sans-serif" size="-1" color=""> Introduction </font></td> </tr> </tbody> </table><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/measurement/faq.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB"><font face="geneva,Helvetica,Arial,sans-serif" size="-1">Measurement</font></a><br><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/matter/faq.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB"><font face="geneva,Helvetica,Arial,sans-serif" size="-1">Matter</font></a><br><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/atoms/faq.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB"><font face="geneva,Helvetica,Arial,sans-serif" size="-1">Atoms & ions</font></a><br><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/compounds/faq.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB"><font face="geneva,Helvetica,Arial,sans-serif" size="-1">Compounds</font></a><br><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/reactions/faq.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB"><font face="geneva,Helvetica,Arial,sans-serif" size="-1">Chemical change</font></a><br><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/moles/faq.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB"><font face="geneva,Helvetica,Arial,sans-serif" size="-1">The mole</font></a><br><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/gases/faq.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB"><font face="geneva,Helvetica,Arial,sans-serif" size="-1">Gases</font></a><br><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/thermo/faq.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB"><font face="geneva,Helvetica,Arial,sans-serif" size="-1">Energy & change</font></a><br><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/quantum/faq.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB"><font face="geneva,Helvetica,Arial,sans-serif" size="-1">The quantum theory</font></a><br><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/electrons/faq.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB"><font face="geneva,Helvetica,Arial,sans-serif" size="-1">Electrons in atoms</font></a><br><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/periodic/faq.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB"><font face="geneva,Helvetica,Arial,sans-serif" size="-1">The periodic table</font></a><br><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/bonds/faq.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB"><font face="geneva,Helvetica,Arial,sans-serif" size="-1">Chemical bonds</font></a><br><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/solids/faq.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB"><font face="geneva,Helvetica,Arial,sans-serif" size="-1">Solids</font></a><br><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/liquids/faq.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB"><font face="geneva,Helvetica,Arial,sans-serif" size="-1">Liquids</font></a><br><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/solutions/faq.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB"><font face="geneva,Helvetica,Arial,sans-serif" size="-1">Solutions</font></a><br><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/acidbase/faq.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB"><font face="geneva,Helvetica,Arial,sans-serif" size="-1">Acids & bases</font></a><br><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/redox/faq.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB"><font face="geneva,Helvetica,Arial,sans-serif" size="-1">Redox reactions</font></a><br><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/kinetics/faq.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB"><font face="geneva,Helvetica,Arial,sans-serif" size="-1">Reaction rates</font></a><br><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/organic/faq.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB"><font face="geneva,Helvetica,Arial,sans-serif" size="-1">Organic chemistry</font></a><br><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/consumer/faq.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB"><font face="geneva,Helvetica,Arial,sans-serif" size="-1">Everyday chemistry</font></a><br><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/inorganic/faq.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB"><font face="geneva,Helvetica,Arial,sans-serif" size="-1">Inorganic chemistry</font></a><br><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/environmental/faq.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB"><font face="geneva,Helvetica,Arial,sans-serif" size="-1">Environmental chemistry</font></a><br><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/safety/faq.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB"><font face="geneva,Helvetica,Arial,sans-serif" size="-1">Laboratory</font></a><br><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/history/faq.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB"><font face="geneva,Helvetica,Arial,sans-serif" size="-1">History of chemistry</font></a><br><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/misc/faq.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB"><font face="geneva,Helvetica,Arial,sans-serif" size="-1">Miscellaneous</font></a><br><p></p><br></td> <td><img src="/web/20161119040940im_/http://antoine.frostburg.edu/chem/senese/images/dot.gif" height="1" width="1" alt="" hspace="25" vspace="0" border="0"></td> <td><font size="-1" color="#333333" face="geneva,Helvetica,Arial,sans-serif"><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/index.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB">Home</a> <img src="/web/20161119040940im_/http://antoine.frostburg.edu/chem/senese/images/pointright.gif" alt=":" hspace="3"><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/faq.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB">FAQ</a></font><a name="Introduction:%3cBR%3eFrequently%20asked%20questions"></a><h1><font face="" color="#000000">Introduction:<br> Frequently asked questions</font></h1><font face="geneva,Helvetica,Arial,sans-serif" size="-1">  <a name="overview"></a><h3>Overview</h3> <ul> <li><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/intro/faq/high-school-preparation.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB">What high school courses should I take to prepare me to be a chemistry major? </a></li> <li><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/intro/faq/what-is-chemistry.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB">What is chemistry? </a></li> </ul><a name="the scientific method"></a><h3>The scientific method</h3> <ul> <li><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/intro/faq/controlled-conditions.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB">What are controlled conditions? </a></li> <li><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/intro/faq/diff-theory-hypothesis.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB">How are theories different from hypotheses? </a></li> <li><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/intro/faq/hypothesis-becomes.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB">Do hypotheses become laws? </a></li> <li><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/intro/faq/law-violations.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB">Are natural laws ever violated? </a></li> <li><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/intro/faq/laws-arent-facts.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB">Are laws facts? </a></li> <li><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/intro/faq/universal-law.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB">Do natural laws apply everywhere? </a></li> <li><a href="https://web-archive-org.translate.goog/web/20161119040940/http://antoine.frostburg.edu/chem/senese/101/intro/faq/why-hypothesis.shtml?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB">What good is a hypothesis? </a></li> </ul></font></td> </tr> <tr valign="TOP"> <td><font 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