Periodic Table Element Comparison: Compare Elements - Neptunium vs Uranium
Compare Neptunium and Uranium on the basis of their properties, attributes and periodic table facts. Compare elements on more than 90 properties. All the elements of similar categories show a lot of similarities and differences in their chemical, atomic, physical properties and uses. These similarities and dissimilarities should be known while we study periodic table elements. You can study the detailed comparison between Neptunium vs Uranium with most reliable information about their properties, attributes, facts, uses etc. You can compare Np vs U on more than 90 properties like electronegativity , oxidation state, atomic shells, orbital structure, Electronaffinity, physical states, electrical conductivity and many more. Neptunium and Uranium comparison table on more than 90 properties.
Neptunium and Uranium Comparison
Facts
| Name | Neptunium | Uranium |
|---|---|---|
| Atomic Number | 93 | 92 |
| Atomic Symbol | Np | U |
| Atomic Weight | 237 | 238.02891 |
| Phase at STP | Solid | Solid |
| Color | Silver | Silver |
| Metallic Classification | Actinide | Actinide |
| Group in Periodic Table | group - | group - |
| Group Name | ||
| Period in Periodic Table | period 7 | period 7 |
| Block in Periodic Table | f -block | f -block |
| Electronic Configuration | [Rn] 5f4 6d1 7s2 | [Rn] 5f3 6d1 7s2 |
| Electronic Shell Structure (Electrons per shell) | 2, 8, 18, 32, 22, 9, 2 | 2, 8, 18, 32, 21, 9, 2 |
| Melting Point | 917 K | 1408 K |
| Boiling Point | 4273 K | 4200 K |
| CAS Number | CAS7439-99-8 | CAS7440-61-1 |
| Neighborhood Elements | Neighborhood Elements of Neptunium | Neighborhood Elements of Uranium |
History
| Parameter | Neptunium | Uranium |
|---|---|---|
| History | The element Neptunium was discovered by E.M. McMillan and H. Abelson in year 1940 in United States. Neptunium derived its name from Neptune, the eighth planet in the Solar System. | The element Uranium was discovered by H. Klaproth in year 1789 in Germany. Uranium derived its name from Uranus, the seventh planet in the Solar System. |
| Discovery | E.M. McMillan and H. Abelson (1940) | H. Klaproth (1789) |
| Isolated | () | E.-M. Péligot (1841) |
Presence: Abundance in Nature and Around Us
Parts per billion (ppb) by weight / by atoms (1ppb =10^-7 %)
| Property | Neptunium | Uranium |
|---|---|---|
| Abundance in Universe | - / - | 0.2 / 0.001 |
| Abundance in Sun | - / - | 1 / 0.004 |
| Abundance in Meteorites | - / - | 10 / 1 |
| Abundance in Earth's Crust | - / - | 1800 / 150 |
| Abundance in Oceans | - / - | 3.3 / 0.086 |
| Abundance in Humans | - / - | 1 / 0.03 |
Crystal Structure and Atomic Structure
| Property | Neptunium | Uranium |
|---|---|---|
| Atomic Volume | 11.5892 cm3/mol | 12.495 cm3/mol |
| Atomic Radius | 175 pm | 175 pm |
| Covalent Radius | - | - |
| Van der Waals Radius | - | 186 pm |
Atomic Spectrum - Spectral Lines | ||
| Emission Spectrum | Not available |  |
| Absorption Spectrum |  |  |
| Lattice Constant | 666.3, 472.3, 488.7 pm | 285.37, 586.95, 495.48 pm |
| Lattice Angle | π/2, π/2, π/2 | π/2, π/2, π/2 |
| Space Group Name | Pnma | Cmcm |
| Space Group Number | 62 | 63 |
| Crystal Structure | Simple Orthorhombic  | Base Centered Orthorhombic  |
Atomic and Orbital Properties
| Property | Neptunium | Uranium |
|---|---|---|
| Atomic Number | 93 | 92 |
| Number of Electrons (with no charge) | 93 | 92 |
| Number of Protons | 93 | 92 |
| Mass Number | 237 | 238.02891 |
| Number of Neutrons | 144 | 146 |
| Shell structure (Electrons per energy level) | 2, 8, 18, 32, 22, 9, 2 | 2, 8, 18, 32, 21, 9, 2 |
| Electron Configuration | [Rn] 5f4 6d1 7s2 | [Rn] 5f3 6d1 7s2 |
| Valence Electrons | 5f4 6d1 7s2 | 5f3 6d1 7s2 |
| Oxidation State | 5 | 4, 6 |
| Atomic Term Symbol (Quantum Numbers) | 6L11/2 | 5L6 |
| Shell structure |  |  |
Isotopes and Nuclear Properties
Neptunium has 0 stable naturally occuring isotopes while Uranium has 0 stable naturally occuring isotopes.
| Parameter | Neptunium | Uranium |
|---|---|---|
| Known Isotopes | 225Np, 226Np, 227Np, 228Np, 229Np, 230Np, 231Np, 232Np, 233Np, 234Np, 235Np, 236Np, 237Np, 238Np, 239Np, 240Np, 241Np, 242Np, 243Np, 244Np | 217U, 218U, 219U, 220U, 221U, 222U, 223U, 224U, 225U, 226U, 227U, 228U, 229U, 230U, 231U, 232U, 233U, 234U, 235U, 236U, 237U, 238U, 239U, 240U, 241U, 242U |
| Stable Isotopes | - | |
| Neutron Cross Section | 180 | 7.57 |
| Neutron Mass Absorption | - | 0.0005 |
Chemical Properties: Ionization Energies and electron affinity
| Property | Neptunium | Uranium |
|---|---|---|
| Valence or Valency | 6 | 6 |
| Electronegativity | 1.36 Pauling Scale | 1.38 Pauling Scale |
| Electron Affinity | - | - |
| Ionization Energies | 1st: 604.5 kJ/mol | 1st: 597.6 kJ/mol 2nd: 1420 kJ/mol |
Physical Properties
| Property | Neptunium | Uranium |
|---|---|---|
| Density | 20.45 g/cm3 | 19.05 g/cm3 |
| Molar Volume | 11.5892 cm3/mol | 12.495 cm3/mol |
Elastic Properties | ||
| Young Modulus | - | 208 |
| Shear Modulus | - | 111 GPa |
| Bulk Modulus | - | 100 GPa |
| Poisson Ratio | - | 0.23 |
Hardness - Tests to Measure of Hardness of Element | ||
| Mohs Hardness | - | 6 MPa |
| Vickers Hardness | - | 1960 MPa |
| Brinell Hardness | - | 2400 MPa |
Electrical Properties | ||
| Electrical Conductivity | 830000 S/m | 3600000 S/m |
| Resistivity | 0.0000012 m Ω | 2.79e-7 m Ω |
| Superconducting Point | - | 0.68 |
Heat and Conduction Properties | ||
| Thermal Conductivity | 6 W/(m K) | 27 W/(m K) |
| Thermal Expansion | - | 0.0000139 /K |
Magnetic Properties | ||
| Magnetic Type | - | Paramagnetic |
| Curie Point | - | - |
| Mass Magnetic Susceptibility | - | 2.16e-8 m3/kg |
| Molar Magnetic Susceptibility | - | 5.14e-9 m3/mol |
| Volume Magnetic Susceptibility | - | 0.000411 |
Optical Properties | ||
| Refractive Index | - | - |
Acoustic Properties | ||
| Speed of Sound | - | 3155 m/s |
Thermal Properties - Enthalpies and thermodynamics
| Property | Neptunium | Uranium |
|---|---|---|
| Melting Point | 917 K | 1408 K |
| Boiling Point | 4273 K | 4200 K |
| Critical Temperature | - | - |
| Superconducting Point | - | 0.68 |
Enthalpies | ||
| Heat of Fusion | 10 kJ/mol | 14 kJ/mol |
| Heat of Vaporization | 335 kJ/mol | 420 kJ/mol |
| Heat of Combustion | - | - |
Regulatory and Health - Health and Safety Parameters and Guidelines
| Parameter | Neptunium | Uranium |
|---|---|---|
| CAS Number | CAS7439-99-8 | CAS7440-61-1 |
| RTECS Number | - | RTECSYR3490000 |
| DOT Hazard Class | - | 7 |
| DOT Numbers | - | 2979 |
| EU Number | - | EU231-170-6 |
| NFPA Fire Rating | - | - |
| NFPA Health Rating | - | - |
| NFPA Reactivity Rating | - | - |
| NFPA Hazards | - | - |
| AutoIgnition Point | - | - |
| Flashpoint | - | - |
Compare With Other Elements
Compare Neptunium and Uranium with other elements of the periodic table.