Neptunium is an artificial element; but significant amounts of neptunium are gathered in nuclear wastes from nuclear reactors, now without uses.
Neptunium contain atoms, not molecules.
Neptunium has not minerals. It is an artificial element and in the nature is very rare, in some uranium ores.
The majority of neptunium characteristics are common to other metals.
Neptunium is not a common commercial product; it is under a strict control.
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].
Uranium is more common and useful.
Examples: NpO2, NpCl3, NpF3.
Neptunium trifluoride is an intermediate for the preparation of neptunium metal.
Neptunium is a metal.
Neptunium has not a smell.
For the most common isotope of neptunium, Np-237, the decay daughter is protactinium-233.Each isotope has another type of decay.
Neptunium is an individual element; isotopes of neptunium are not separated.