Compare Mercury vs Arsenic: Periodic Table Element Comparison Table and Properties
Compare the elements Mercury and Arsenic on the basis of their properties, attributes and periodic table facts. Compare elements - Mercury and Arsenic comparison table side by side across over 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 Mercury vs Arsenic with most reliable information about their properties, attributes, facts, uses etc. You can compare Hg vs As on more than 90 properties like electronegativity, oxidation state, atomic shells, orbital structure, Electronaffinity, physical states, electrical conductivity and many more. This in-depth comparison helps students, educators, researchers, and science enthusiasts understand the differences and similarities between Mercury and Arsenic.
Mercury and Arsenic Comparison
Here's a detailed comparison between Mercury (Hg) and Arsenic (As), focusing on their position in the periodic table, physical and chemical properties, stability, and uses.
Facts - Basic Element Details
| Name | Mercury | Arsenic |
|---|---|---|
| Atomic Number | 80 | 33 |
| Atomic Symbol | Hg | As |
| Atomic Weight | 200.59 | 74.9216 |
| Phase at STP | Liquid | Solid |
| Color | Silver | Silver |
| Metallic Classification | Transition Metal | Metalloid |
| Group in Periodic Table | group 12 | group 15 |
| Group Name | zinc family | nitrogen family |
| Period in Periodic Table | period 6 | period 4 |
| Block in Periodic Table | d -block | p -block |
| Electronic Configuration | [Xe] 4f14 5d10 6s2 | [Ar] 3d10 4s2 4p3 |
| Electronic Shell Structure (Electrons per shell) | 2, 8, 18, 32, 18, 2 | 2, 8, 18, 5 |
| Melting Point | 234.32 K | 1090 K |
| Boiling Point | 629.88 K | 887 K |
| CAS Number | CAS7439-97-6 | CAS7440-38-2 |
| Neighborhood Elements | Neighborhood Elements of Mercury | Neighborhood Elements of Arsenic |
History
| Parameter | Mercury | Arsenic |
|---|---|---|
| History | The element Mercury was discovered by Indians/Chinese in year Before 2000 BCE. Mercury derived its name from the New Latin name mercurius, named after the Roman god (Hg from former name hydrargyrum, from Greek hydr-, 'water', and argyros, 'silver'). | The element Arsenic was discovered by Arabic alchemist in year ca. 800 AD. Arsenic derived its name English word (Latin arsenicum). |
| Discovery | Indians/Chinese (Before 2000 BCE) | Arabic alchemist (ca. 800 AD) |
| Isolated | Egypt (1500 BCE) | () |
Presence: Abundance in Nature and Around Us
Parts per billion (ppb) by weight / by atoms (1ppb =10^-7 %)
| Property | Mercury | Arsenic |
|---|---|---|
| Abundance in Universe | 1 / 0.006 | 8 / 0.1 |
| Abundance in Sun | 20 / 0.12 | - / - |
| Abundance in Meteorites | 250 / 20 | 1800 / 460 |
| Abundance in Earth's Crust | 67 / 7 | 2100 / 580 |
| Abundance in Oceans | 0.05 / 0.0015 | 2.3 / 0.19 |
| Abundance in Humans | - / - | 50 / 4 |
Crystal Structure and Atomic Structure
| Property | Mercury | Arsenic |
|---|---|---|
| Atomic Volume | 14.09 cm3/mol | 12.95 cm3/mol |
| Atomic Radius | 171 pm | 114 pm |
| Covalent Radius | 149 pm | 119 pm |
| Van der Waals Radius | 155 pm | 185 pm |
Atomic Spectrum - Spectral Lines | ||
| Emission Spectrum |  |  |
| Absorption Spectrum |  |  |
| Lattice Constant | 300.5, 300.5, 300.5 pm | 375.98, 375.98, 1054.75 pm |
| Lattice Angle | 1.23081, 1.23081, 1.23081 | π/2, π/2, 2 π/3 |
| Space Group Name | R_ 3m | R_ 3m |
| Space Group Number | 166 | 166 |
| Crystal Structure | Simple Trigonal  | Simple Trigonal |
Atomic and Orbital Properties
| Property | Mercury | Arsenic |
|---|---|---|
| Atomic Number | 80 | 33 |
| Number of Electrons (with no charge) | 80 | 33 |
| Number of Protons | 80 | 33 |
| Mass Number | 200.59 | 74.9216 |
| Number of Neutrons | 121 | 42 |
| Shell structure (Electrons per energy level) | 2, 8, 18, 32, 18, 2 | 2, 8, 18, 5 |
| Electron Configuration | [Xe] 4f14 5d10 6s2 | [Ar] 3d10 4s2 4p3 |
| Valence Electrons | 5d10 6s2 | 4s2 4p3 |
| Oxidation State | 1, 2 | -3, 3, 5 |
| Atomic Term Symbol (Quantum Numbers) | 1S0 | 4S3/2 |
| Shell structure |  |  |
Isotopes and Nuclear Properties
Mercury has 7 stable naturally occuring isotopes while Arsenic has 1 stable naturally occuring isotopes.
| Parameter | Mercury | Arsenic |
|---|---|---|
| Known Isotopes | 171Hg, 172Hg, 173Hg, 174Hg, 175Hg, 176Hg, 177Hg, 178Hg, 179Hg, 180Hg, 181Hg, 182Hg, 183Hg, 184Hg, 185Hg, 186Hg, 187Hg, 188Hg, 189Hg, 190Hg, 191Hg, 192Hg, 193Hg, 194Hg, 195Hg, 196Hg, 197Hg, 198Hg, 199Hg, 200Hg, 201Hg, 202Hg, 203Hg, 204Hg, 205Hg, 206Hg, 207Hg, 208Hg, 209Hg, 210Hg | 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 |
| Stable Isotopes | Naturally occurring stable isotopes: 196Hg, 198Hg, 199Hg, 200Hg, 201Hg, 202Hg, 204Hg | Naturally occurring stable isotopes: 75As |
| Neutron Cross Section | 374 | 4.3 |
| Neutron Mass Absorption | 0.063 | 0.002 |
Chemical Properties: Ionization Energies and electron affinity
| Property | Mercury | Arsenic |
|---|---|---|
| Valence or Valency | 2 | 5 |
| Electronegativity | 2 Pauling Scale | 2.18 Pauling Scale |
| Oxidation State | 1, 2 | -3, 3, 5 |
| Electron Affinity | 0 kJ/mol | 78 kJ/mol |
| Ionization Energies | 1st: 1007.1 kJ/mol 2nd: 1810 kJ/mol 3rd: 3300 kJ/mol | 1st: 947 kJ/mol 2nd: 1798 kJ/mol 3rd: 2735 kJ/mol 4th: 4837 kJ/mol 5th: 6043 kJ/mol 6th: 12310 kJ/mol |
Physical Properties
Arsenic (5.727 g/cm³) is less dense than Mercury (13.534 g/cm³). This means that a given volume of Mercury will be heavier than the same volume of Arsenic. Mercury is about 136.3 denser than Arsenic
| Property | Mercury | Arsenic |
|---|---|---|
| Phase at STP | Liquid | Solid |
| Color | Silver | Silver |
| Density | 13.534 g/cm3 | 5.727 g/cm3 |
| Density (when liquid (at melting point)) | 13.534 g/cm3 | 5.22 g/cm3 |
| Molar Volume | 14.09 cm3/mol | 12.95 cm3/mol |
Mechanical and Hardness Properties
| Property | Mercury | Arsenic |
|---|---|---|
Elastic Properties | ||
| Young Modulus | - | 8 |
| Shear Modulus | - | - |
| Bulk Modulus | 25 GPa | 22 GPa |
| Poisson Ratio | - | - |
Hardness - Tests to Measure of Hardness of Element | ||
| Mohs Hardness | - | 3.5 MPa |
| Vickers Hardness | - | - |
| Brinell Hardness | - | 1440 MPa |
Thermal and Electrical Conductivity
| Property | Mercury | Arsenic |
|---|---|---|
Heat and Conduction Properties | ||
| Thermal Conductivity | 8.3 W/(m K) | 50 W/(m K) |
| Thermal Expansion | - | - |
Electrical Properties | ||
| Electrical Conductivity | 1000000 S/m | 3300000 S/m |
| Resistivity | 9.6e-7 m Ω | 3e-7 m Ω |
| Superconducting Point | 4.154 | - |
Magnetic and Optical Properties
| Property | Mercury | Arsenic |
|---|---|---|
Magnetic Properties | ||
| Magnetic Type | Diamagnetic | Diamagnetic |
| Curie Point | - | - |
| Mass Magnetic Susceptibility | -2.1e-9 m3/kg | -3.9e-9 m3/kg |
| Molar Magnetic Susceptibility | -4.21e-10 m3/mol | -2.92e-10 m3/mol |
| Volume Magnetic Susceptibility | -0.0000284 | -0.0000223 |
Optical Properties | ||
| Refractive Index | 1.000933 | 1.001552 |
Acoustic Properties | ||
| Speed of Sound | 1407 m/s | - |
Thermal Properties - Enthalpies and thermodynamics
| Property | Mercury | Arsenic |
|---|---|---|
| Melting Point | 234.32 K | 1090 K |
| Boiling Point | 629.88 K | 887 K |
| Critical Temperature | 1750 K | - |
| Superconducting Point | 4.154 | - |
Enthalpies | ||
| Heat of Fusion | 2.29 kJ/mol | 27.7 kJ/mol |
| Heat of Vaporization | 59.2 kJ/mol | 32.4 kJ/mol |
| Heat of Combustion | - | - |
Regulatory and Health - Health and Safety Parameters and Guidelines
| Parameter | Mercury | Arsenic |
|---|---|---|
| CAS Number | CAS7439-97-6 | CAS7440-38-2 |
| RTECS Number | RTECSOV4550000 | {N/A, RTECSCG0525000, N/A} |
| DOT Hazard Class | 8 | 6.1 |
| DOT Numbers | 2809 | 1558 |
| EU Number | - | - |
| NFPA Fire Rating | 0 | 2 |
| NFPA Health Rating | 3 | 3 |
| NFPA Reactivity Rating | 0 | - |
| NFPA Hazards | - | - |
| AutoIgnition Point | - | - |
| Flashpoint | - | - |
Compare Mercury and Arsenic With Other Elements
Compare Mercury and Arsenic with other elements of the periodic table. Explore howMercury and Arsenic stack up against other elements of the periodic table. Use our interactive comparison tool to analyze 90+ properties across different metals, non-metals, metalloids, and noble gases. Understanding these differences is crucial for applications in engineering, chemistry, electronics, biology, and material science.