Neptunium is a ductile metal.
Uranium is a fairly malleable substance, and it is also ductile.
Yes, neptunium is an artificial chemical element.
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 is an individual element; isotopes of neptunium are not separated.
No, neptunium is not a naturally occurring element. It is a synthetic element that was first produced in a laboratory setting in 1940.
Neptunium was discovered in 1940.
Neptunium is an artificial element; it is not mined.
Neptunium is a chemical element.
neptunium has 93 protons.
Any element; neptunium can form himself a critical mass.
Neptunium is an artificial chemical element but neptunium can be found also in the nature as a result of decay processes in uranium ores, only in ultratraces.
No, ductile is not an element. Ductility is a property of some elements and materials that allows them to be stretched or deformed without breaking. Examples of ductile elements include gold, copper, and platinum.