Periodic Table Element Comparison: Compare Elements - Antimony vs Neptunium
Compare Antimony and Neptunium
Compare Antimony and Neptunium 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 Antimony vs Neptunium with most reliable information about their properties, attributes, facts, uses etc. You can compare Sb vs Np on more than 90 properties like electronegativity , oxidation state, atomic shells, orbital structure, Electronaffinity, physical states, electrical conductivity and many more.
Facts
| Name | Antimony | Neptunium |
| Atomic Number | 51 | 93 |
| Atomic Symbol | Sb | Np |
| Atomic Weight | 121.76 | 237 |
| Phase at STP | Solid | Solid |
| Color | Silver | Silver |
| Metallic Classification | Metalloid | Actinide |
| Group in Periodic Table | group 15 | group - |
| Group Name | nitrogen family | |
| Period in Periodic Table | period 5 | period 7 |
| Block in Periodic Table | p -block | f -block |
| Electronic Configuration | [Kr] 4d10 5s2 5p3 | [Rn] 5f4 6d1 7s2 |
| Electronic Shell Structure (Electrons per shell) | 2, 8, 18, 18, 5 | 2, 8, 18, 32, 22, 9, 2 |
| Melting Point | 903.78 K | 917 K |
| Boiling Point | 1860 K | 4273 K |
| CAS Number | CAS7440-36-0 | CAS7439-99-8 |
| Neighborhood Elements | Neighborhood Elements of Antimony | Neighborhood Elements of Neptunium |
History
| History | The element Antimony was discovered by Arabic alchemist in year ca. 800 AD in one. Antimony derived its name from the Greek anti, 'against', and monos, 'alone' (stibium in Latin). | 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. |
| Discovery | Arabic alchemist (ca. 800 AD) | E.M. McMillan and H. Abelson (1940) |
| Isolated | () | () |
Presence: Abundance in Nature and Around Us
Parts per billion (ppb) by weight / by atoms (1ppb =10^-7 %)
| Abundance in Universe | 0.4 / 0.004 | - / - |
| Abundance in Sun | 1 / 0.01 | - / - |
| Abundance in Meteorites | 120 / 20 | - / - |
| Abundance in Earth's Crust | 200 / 30 | - / - |
| Abundance in Oceans | 0.2 / 0.010 | - / - |
| Abundance in Humans | - / - | - / - |
Crystal Structure and Atomic Structure
| Atomic Volume | 18.181 cm3/mol | 11.5892 cm3/mol |
| Atomic Radius | 133 pm | 175 pm |
| Covalent Radius | 138 pm | - |
| Van der Waals Radius | 206 pm | - |
| Atomic Spectrum |  |  |
| Lattice Constant | 430.7, 430.7, 1127.3 pm | 666.3, 472.3, 488.7 pm |
| Lattice Angle | π/2, π/2, 2 π/3 | π/2, π/2, π/2 |
| Space Group Name | R_ 3m | Pnma |
| Space Group Number | 166 | 62 |
| Crystal Structure | Simple Trigonal  | Simple Orthorhombic  |
Atomic and Orbital Properties
| Atomic Number | 51 | 93 |
| Number of Electrons (with no charge) | 51 | 93 |
| Number of Protons | 51 | 93 |
| Mass Number | 121.76 | 237 |
| Number of Neutrons | 71 | 144 |
| Shell structure (Electrons per energy level) | 2, 8, 18, 18, 5 | 2, 8, 18, 32, 22, 9, 2 |
| Electron Configuration | [Kr] 4d10 5s2 5p3 | [Rn] 5f4 6d1 7s2 |
| Valence Electrons | 5s2 5p3 | 5f4 6d1 7s2 |
| Oxidation State | -3, 3, 5 | 5 |
| Atomic Term Symbol (Quantum Numbers) | 4S3/2 | 6L11/2 |
| Shell structure |  |  |
Isotopes and Nuclear Properties
Antimony has 2 stable naturally occuring isotopes while Neptunium has 0 stable naturally occuring isotopes.
| Known Isotopes | 103Sb, 104Sb, 105Sb, 106Sb, 107Sb, 108Sb, 109Sb, 110Sb, 111Sb, 112Sb, 113Sb, 114Sb, 115Sb, 116Sb, 117Sb, 118Sb, 119Sb, 120Sb, 121Sb, 122Sb, 123Sb, 124Sb, 125Sb, 126Sb, 127Sb, 128Sb, 129Sb, 130Sb, 131Sb, 132Sb, 133Sb, 134Sb, 135Sb, 136Sb, 137Sb, 138Sb, 139Sb | 225Np, 226Np, 227Np, 228Np, 229Np, 230Np, 231Np, 232Np, 233Np, 234Np, 235Np, 236Np, 237Np, 238Np, 239Np, 240Np, 241Np, 242Np, 243Np, 244Np |
| Stable Isotopes | Naturally occurring stable isotopes: 121Sb, 123Sb | |
| Neutron Cross Section | 5.4 | 180 |
| Neutron Mass Absorption | 0.0016 | - |
Chemical Properties: Ionization Energies and electron affinity
| Valence or Valency | 5 | 6 |
| Electronegativity | 2.05 Pauling Scale | 1.36 Pauling Scale |
| Electron Affinity | 103.2 kJ/mol | - |
| Ionization Energies | 1st: 834 kJ/mol 2nd: 1594.9 kJ/mol 3rd: 2440 kJ/mol 4th: 4260 kJ/mol 5th: 5400 kJ/mol 6th: 10400 kJ/mol | 1st: 604.5 kJ/mol |
Physical Properties
| Density | 6.697 g/cm3 | 20.45 g/cm3 |
| Molar Volume | 18.181 cm3/mol | 11.5892 cm3/mol |
Elastic Properties | ||
| Young Modulus | 55 | - |
| Shear Modulus | 20 GPa | - |
| Bulk Modulus | 42 GPa | - |
| Poisson Ratio | - | - |
Hardness - Tests to Measure of Hardness of Element | ||
| Mohs Hardness | 3 MPa | - |
| Vickers Hardness | - | - |
| Brinell Hardness | 294 MPa | - |
Electrical Properties | ||
| Electrical Conductivity | 2500000 S/m | 830000 S/m |
| Resistivity | 4e-7 m Ω | 0.0000012 m Ω |
| Superconducting Point | - | - |
Heat and Conduction Properties | ||
| Thermal Conductivity | 24 W/(m K) | 6 W/(m K) |
| Thermal Expansion | 0.000011 /K | - |
Magnetic Properties | ||
| Magnetic Type | Diamagnetic | - |
| Curie Point | - | - |
| Mass Magnetic Susceptibility | -1.09e-8 m3/kg | - |
| Molar Magnetic Susceptibility | -1.327e-9 m3/mol | - |
| Volume Magnetic Susceptibility | -0.000073 | - |
Optical Properties | ||
| Refractive Index | - | - |
Acoustic Properties | ||
| Speed of Sound | 3420 m/s | - |
Thermal Properties - Enthalpies and thermodynamics
| Melting Point | 903.78 K | 917 K |
| Boiling Point | 1860 K | 4273 K |
| Critical Temperature | - | - |
| Superconducting Point | - | - |
Enthalpies | ||
| Heat of Fusion | 19.7 kJ/mol | 10 kJ/mol |
| Heat of Vaporization | 68 kJ/mol | 335 kJ/mol |
| Heat of Combustion | - | - |
Regulatory and Health - Health and Safety Parameters and Guidelines
| CAS Number | CAS7440-36-0 | CAS7439-99-8 |
| RTECS Number | {RTECSCC4025000} | - |
| DOT Hazard Class | {N/A} | - |
| DOT Numbers | "N/A" | - |
| EU Number | - | - |
| NFPA Fire Rating | {N/A} | - |
| NFPA Hazards | N/ A | - |
| NFPA Health Rating | - | - |
| NFPA Reactivity Rating | {N/A} | - |
| AutoIgnition Point | - | - |
| Flashpoint | - | - |