At the far end of the periodic table is a realm where nothing is quite as it should be. The elements here, starting at atomic number 104 (rutherfordium), have never been found in nature. In fact, they ...
Standard atomic weights, those numbers emblazoned under the elements on the periodic table, were once thought of as unchanging constants of nature. But researchers have tweaked the atomic weights of ...
Arvin Ash on MSNOpinion
Understanding why protons define elements
Why does changing just one proton in the nucleus of an atom create a different element? The number of protons in an atomic ...
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