Periodic Table Element Comparison: Compare Elements - Arsenic vs Boron
Compare Arsenic and Boron 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 Arsenic vs Boron with most reliable information about their properties, attributes, facts, uses etc. You can compare As vs B on more than 90 properties like electronegativity , oxidation state, atomic shells, orbital structure, Electronaffinity, physical states, electrical conductivity and many more. Arsenic and Boron comparison table on more than 90 properties.
Arsenic and Boron Comparison
Facts
| Name | Arsenic | Boron |
|---|---|---|
| Atomic Number | 33 | 5 |
| Atomic Symbol | As | B |
| Atomic Weight | 74.9216 | 10.811 |
| Phase at STP | Solid | Solid |
| Color | Silver | Black |
| Metallic Classification | Metalloid | Metalloid |
| Group in Periodic Table | group 15 | group 13 |
| Group Name | nitrogen family | boron family |
| Period in Periodic Table | period 4 | period 2 |
| Block in Periodic Table | p -block | p -block |
| Electronic Configuration | [Ar] 3d10 4s2 4p3 | [He] 2s2 2p1 |
| Electronic Shell Structure (Electrons per shell) | 2, 8, 18, 5 | 2, 3 |
| Melting Point | 1090 K | 2348 K |
| Boiling Point | 887 K | 4273 K |
| CAS Number | CAS7440-38-2 | CAS7440-42-8 |
| Neighborhood Elements | Neighborhood Elements of Arsenic | Neighborhood Elements of Boron |
History
| Parameter | Arsenic | Boron |
|---|---|---|
| History | The element Arsenic was discovered by Arabic alchemist in year ca. 800 AD. Arsenic derived its name English word (Latin arsenicum). | The element Boron was discovered by L. Gay-Lussac and L.J. Thénard in year 1808 in France and United Kingdom. Boron derived its name from borax, a mineral. |
| Discovery | Arabic alchemist (ca. 800 AD) | L. Gay-Lussac and L.J. Thénard (1808) |
| Isolated | () | H. Davy (1808) |
Presence: Abundance in Nature and Around Us
Parts per billion (ppb) by weight / by atoms (1ppb =10^-7 %)
| Property | Arsenic | Boron |
|---|---|---|
| Abundance in Universe | 8 / 0.1 | 1 / 0.1 |
| Abundance in Sun | - / - | 2 / 0.2 |
| Abundance in Meteorites | 1800 / 460 | 1600 / 3000 |
| Abundance in Earth's Crust | 2100 / 580 | 8700 / 17000 |
| Abundance in Oceans | 2.3 / 0.19 | 4440 / 2500 |
| Abundance in Humans | 50 / 4 | 700 / 410 |
Crystal Structure and Atomic Structure
| Property | Arsenic | Boron |
|---|---|---|
| Atomic Volume | 12.95 cm3/mol | 4.3947 cm3/mol |
| Atomic Radius | 114 pm | 87 pm |
| Covalent Radius | 119 pm | 82 pm |
| Van der Waals Radius | 185 pm | 192 pm |
Atomic Spectrum - Spectral Lines | ||
| Emission Spectrum |  | Not available |
| Absorption Spectrum |  |  |
| Lattice Constant | 375.98, 375.98, 1054.75 pm | 506, 506, 506 pm |
| Lattice Angle | π/2, π/2, 2 π/3 | 1.01334, 1.01334, 1.01334 |
| Space Group Name | R_ 3m | R_ 3m |
| Space Group Number | 166 | 166 |
| Crystal Structure | Simple Trigonal  | Simple Trigonal |
Atomic and Orbital Properties
| Property | Arsenic | Boron |
|---|---|---|
| Atomic Number | 33 | 5 |
| Number of Electrons (with no charge) | 33 | 5 |
| Number of Protons | 33 | 5 |
| Mass Number | 74.9216 | 10.811 |
| Number of Neutrons | 42 | 6 |
| Shell structure (Electrons per energy level) | 2, 8, 18, 5 | 2, 3 |
| Electron Configuration | [Ar] 3d10 4s2 4p3 | [He] 2s2 2p1 |
| Valence Electrons | 4s2 4p3 | 2s2 2p1 |
| Oxidation State | -3, 3, 5 | 3 |
| Atomic Term Symbol (Quantum Numbers) | 4S3/2 | 2P1/2 |
| Shell structure |  |  |
Isotopes and Nuclear Properties
Arsenic has 1 stable naturally occuring isotopes while Boron has 2 stable naturally occuring isotopes.
| Parameter | Arsenic | Boron |
|---|---|---|
| Known Isotopes | 60As, 61As, 62As, 63As, 64As, 65As, 66As, 67As, 68As, 69As, 70As, 71As, 72As, 73As, 74As, 75As, 76As, 77As, 78As, 79As, 80As, 81As, 82As, 83As, 84As, 85As, 86As, 87As, 88As, 89As, 90As, 91As, 92As | 6B, 7B, 8B, 9B, 10B, 11B, 12B, 13B, 14B, 15B, 16B, 17B, 18B, 19B |
| Stable Isotopes | Naturally occurring stable isotopes: 75As | Naturally occurring stable isotopes: 10B, 11B |
| Neutron Cross Section | 4.3 | 755 |
| Neutron Mass Absorption | 0.002 | 2.4 |
Chemical Properties: Ionization Energies and electron affinity
| Property | Arsenic | Boron |
|---|---|---|
| Valence or Valency | 5 | 3 |
| Electronegativity | 2.18 Pauling Scale | 2.04 Pauling Scale |
| Electron Affinity | 78 kJ/mol | 26.7 kJ/mol |
| Ionization Energies | 1st: 947 kJ/mol 2nd: 1798 kJ/mol 3rd: 2735 kJ/mol 4th: 4837 kJ/mol 5th: 6043 kJ/mol 6th: 12310 kJ/mol | 1st: 800.6 kJ/mol 2nd: 2427.1 kJ/mol 3rd: 3659.7 kJ/mol 4th: 25025.8 kJ/mol 5th: 32826.7 kJ/mol |
Physical Properties
| Property | Arsenic | Boron |
|---|---|---|
| Density | 5.727 g/cm3 | 2.46 g/cm3 |
| Molar Volume | 12.95 cm3/mol | 4.3947 cm3/mol |
Elastic Properties | ||
| Young Modulus | 8 | - |
| Shear Modulus | - | - |
| Bulk Modulus | 22 GPa | 320 GPa |
| Poisson Ratio | - | - |
Hardness - Tests to Measure of Hardness of Element | ||
| Mohs Hardness | 3.5 MPa | 9.3 MPa |
| Vickers Hardness | - | 49000 MPa |
| Brinell Hardness | 1440 MPa | - |
Electrical Properties | ||
| Electrical Conductivity | 3300000 S/m | 0.0001 S/m |
| Resistivity | 3e-7 m Ω | 10000 m Ω |
| Superconducting Point | - | - |
Heat and Conduction Properties | ||
| Thermal Conductivity | 50 W/(m K) | 27 W/(m K) |
| Thermal Expansion | - | 0.000006 /K |
Magnetic Properties | ||
| Magnetic Type | Diamagnetic | Diamagnetic |
| Curie Point | - | - |
| Mass Magnetic Susceptibility | -3.9e-9 m3/kg | -8.7e-9 m3/kg |
| Molar Magnetic Susceptibility | -2.92e-10 m3/mol | -9.41e-11 m3/mol |
| Volume Magnetic Susceptibility | -0.0000223 | -0.0000214 |
Optical Properties | ||
| Refractive Index | 1.001552 | - |
Acoustic Properties | ||
| Speed of Sound | - | 16200 m/s |
Thermal Properties - Enthalpies and thermodynamics
| Property | Arsenic | Boron |
|---|---|---|
| Melting Point | 1090 K | 2348 K |
| Boiling Point | 887 K | 4273 K |
| Critical Temperature | - | - |
| Superconducting Point | - | - |
Enthalpies | ||
| Heat of Fusion | 27.7 kJ/mol | 50 kJ/mol |
| Heat of Vaporization | 32.4 kJ/mol | 507 kJ/mol |
| Heat of Combustion | - | - |
Regulatory and Health - Health and Safety Parameters and Guidelines
| Parameter | Arsenic | Boron |
|---|---|---|
| CAS Number | CAS7440-38-2 | CAS7440-42-8 |
| RTECS Number | {N/A, RTECSCG0525000, N/A} | RTECSED7350000 |
| DOT Hazard Class | 6.1 | - |
| DOT Numbers | 1558 | - |
| EU Number | - | - |
| NFPA Fire Rating | 2 | 3 |
| NFPA Health Rating | 3 | 2 |
| NFPA Reactivity Rating | - | 0 |
| NFPA Hazards | - | - |
| AutoIgnition Point | - | - |
| Flashpoint | - | - |
Compare With Other Elements
Compare Arsenic and Boron with other elements of the periodic table.