24

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The atomic numbers (proton-electron pairs) of 24 of the naturally occurring (Hydrogen through Uranium) elements from the periodic table are prime. Coincidentally, 24 of the naturally occurring elements have a prime number of nucleons (protons and neutrons). [Welch]

Submitted: 2004-01-12 22:39:21;   Last Modified: 2008-01-30 11:28:00.
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