Neptunium is a metal, solid, radioactive, artificial, dense, reactive.
Neptunium has only limited uses:
- precursor in the preparation of plutonium-238
- sensor in the detectors of high energy neutrons
In USA are studied applications of neptunium for nuclear weapons or as nuclear fuels.
No, neptunium is not a naturally occurring element. It is a synthetic element that was first produced in a laboratory setting in 1940.
Assuming you mean man[made], no. Trace amounts of neptunium are found in uranium ores in Nature.
Neptunium(IV) oxide or neptunium dioxide is the chemical compound composed of neptunium and oxygen with the formula NpO2. It forms dark olive[4] green cubic crystals[1].
For the first preparation of neptunium the nuclear reaction was:U-238 + n --------------- U-239---------------Np-239
Neptunium was obtained for the first time by Edwin McMillan and Philip H. Abelson in 1940 at Berkeley Laboratories.
Neptunium is ductile and malleable; see also at: http://www.onemine.org/search/summary.cfm/Institute-of-Metals-Division--Fabrication-of-Neptunium237-Wire-by-Extrusion-TN?d=25FB0091D9A4A9A7F667E4C439E0ED9006727D6BC0570438EA2470D65AC3E9C126367
Neptunium has not minerals. It is an artificial element and in the nature is very rare, in some uranium ores.
Some uses of neptunium: - component of high energy neutron detectors - precursor for the preparation of 238Pu
Edwin McMillan and Philip Abelson obtained for the first time neptunium in 1940 at Berkeley Radiation Laboratories, USA.
When neptunium atoms fall apart, they can form various isotopes of other elements. Neptunium decay series typically produce isotopes of uranium, thorium, and protactinium as the neptunium atom undergoes radioactive decay.
Neptunium trifluoride is an intermediate for the preparation of neptunium metal.
Neptunium is a metal.