Neptunium was produced in 1940 by McMillan and Abelson.
Neptunium is a radioactive element that is usually made in the laboratory, but can be found naturally in minute quantities in association with Uranium ores.
This was the first element higher in atomic number than Uranium to be discovered.
- Atomic Number: 93
- Atomic Weight: 237.05
- Melting Point: 640
- Boiling Point: 3902
- Specific Gravity: 18.0-20.45 (depending on allotropic form)
- Valences: 3,4,5 and 6
Webpages that Work! Zeuter Development Corporation
Post Office Box 225, Parry Sound, Ontario, CANADA P2A 2X3
Copyright © Zeuter Development Corporation, 1996-2022. All rights reserved.