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Neptunium is a hard, silvery, ductile, radioactive actinide metal. In the periodic table, it is located to the right of the actinide uranium, to the left of the actinide plutonium and below the lanthanide promethium. [8] Neptunium is a hard metal, having a bulk modulus of 118 GPa, comparable to that of manganese. [9]
Neptunium compounds are compounds containing the element neptunium (Np). Neptunium has five ionic oxidation states ranging from +3 to +7 when forming chemical compounds, which can be simultaneously observed in solutions. It is the heaviest actinide that can lose all its valence electrons in a stable compound.
Physical properties; Phase at ... Spectral lines of neptunium: Other properties; ... E172 would be the end of period 8 ("noble gas") and E173 would be the beginning ...
2 Physical properties. ... Solubility in water. ... Neptunium monocarbide is a binary compound of neptunium metal and carbon with the chemical formula NpC. [1] [2]
Although hydrogen bonding is a relatively weak attraction compared to the covalent bonds within the water molecule itself, it is responsible for several of the water's physical properties. These properties include its relatively high melting and boiling point temperatures: more energy is required to break the hydrogen bonds between water molecules.
Neptunium(IV) phosphide can be formed from the fusion of stoichiometric amounts of neptunium and red phosphorus in an evacuated and sealed quartz tube at 750 °C: [2] [3] 3Np + 4P → Np 3 P 4 Physical properties
2 Physical properties. 3 References. ... Neptunium (III) phosphide is a ... It is insoluble in water. It is antiferromagnetic below 130 K. [4] [5] References
Neptunium nitride is a binary inorganic compound of neptunium and nitrogen with the chemical formula NpN. [1] [2] ... Physical properties ... It is insoluble in water ...