How quantum uncertainty saved the atom
<p>The 19th and early 20th centuries were both the best of times and the worst of times for the building block of all the matter on Earth: the atom. In 1803, <a href="https://www.oxfordreference.com/display/10.1093/oi/authority.20110803095658664" rel="noopener ugc nofollow" target="_blank">John Dalton put forth</a> what we now know as modern atomic theory: the postulate that everything is made of indivisible atoms, where every atom of the same species is identical and possesses the same properties as all other atoms of that type. When atoms combined into chemical compounds, the possibilities become virtually endless, while different atoms themselves could be sorted into classes with similar properties based on the periodic table scheme of Dmitri Mendeleev.</p>
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