Neptunium

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Neptunium is a synthetic chemical element, having the chemical symbol Np.

Neptunium
237.0462



  Np
93
[ ? ] Transuranic element:

Its atomic number (the number of protons) is 93. The most stable isotope has a mass of 237.0462, a half-life of 2.1 million years and is typically found as a solid in its elemental form.


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