Np

Neptunium

Z 93 237.0 g/molActinide Radioactive

Overview Atomic Properties Thermodynamics Electromagnetism Isotopes

Group

3

Period

7

Block

f

Occurrence

Synthetic

Biological Role

---

History

1940 (discovery, isolation)

Edwin McMillan, Philip H. Abelson

Named By

Edwin McMillan, Philip H. Abelson

Latin Name

Neptunium

Abundance

Universe

x

Sun

x

Meteorites

x

Earth's crust

x

Oceans

x

Humans

x