neptunium

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neptunium

 (Np) [nep-too´ne-um]
a chemical element, atomic number 93, atomic weight 237. (See Appendix 6.)

nep·tu·ni·um (Np),

(nep-tū'nē-ŭm),
A radioactive element; atomic no. 93; first element of the transuranian series (not found in nature); 237Np has a half-life of 2.14 × 106 years.
[planet, Neptune]

nep·tu·ni·um

(nep-tū'nē-ŭm)
A radioactive element; atomic no. 93; first element of the transuranian series (not found in nature); 237Np has a half-life of 2.14 × 106 years.
[planet, Neptune]