Periodic Table Element Comparison: Compare Elements - Arsenic vs Hafnium
Compare Arsenic and Hafnium 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 Hafnium with most reliable information about their properties, attributes, facts, uses etc. You can compare As vs Hf on more than 90 properties like electronegativity , oxidation state, atomic shells, orbital structure, Electronaffinity, physical states, electrical conductivity and many more. Arsenic and Hafnium comparison table on more than 90 properties.
Arsenic and Hafnium Comparison
Facts
Name | Arsenic | Hafnium |
---|---|---|
Atomic Number | 33 | 72 |
Atomic Symbol | As | Hf |
Atomic Weight | 74.9216 | 178.49 |
Phase at STP | Solid | Solid |
Color | Silver | Gray |
Metallic Classification | Metalloid | Transition Metal |
Group in Periodic Table | group 15 | group 4 |
Group Name | nitrogen family | titanium family |
Period in Periodic Table | period 4 | period 6 |
Block in Periodic Table | p -block | d -block |
Electronic Configuration | [Ar] 3d10 4s2 4p3 | [Xe] 4f14 5d2 6s2 |
Electronic Shell Structure (Electrons per shell) | 2, 8, 18, 5 | 2, 8, 18, 32, 10, 2 |
Melting Point | 1090 K | 2506 K |
Boiling Point | 887 K | 4876 K |
CAS Number | CAS7440-38-2 | CAS7440-58-6 |
Neighborhood Elements | Neighborhood Elements of Arsenic | Neighborhood Elements of Hafnium |
History
Parameter | Arsenic | Hafnium |
---|---|---|
History | The element Arsenic was discovered by Arabic alchemist in year ca. 800 AD. Arsenic derived its name English word (Latin arsenicum). | The element Hafnium was discovered by D. Coster and G. von Hevesy in year 1922 in Denmark. Hafnium derived its name from Hafnia, the New Latin name for Copenhagen. |
Discovery | Arabic alchemist (ca. 800 AD) | D. Coster and G. von Hevesy (1922) |
Isolated | () | D. Coster and G. von Hevesy (1922) |
Presence: Abundance in Nature and Around Us
Parts per billion (ppb) by weight / by atoms (1ppb =10^-7 %)
Property | Arsenic | Hafnium |
---|---|---|
Abundance in Universe | 8 / 0.1 | 0.7 / 0.005 |
Abundance in Sun | - / - | 1 / 0.01 |
Abundance in Meteorites | 1800 / 460 | 170 / 20 |
Abundance in Earth's Crust | 2100 / 580 | 3300 / 380 |
Abundance in Oceans | 2.3 / 0.19 | 0.008 / 0.00028 |
Abundance in Humans | 50 / 4 | - / - |
Crystal Structure and Atomic Structure
Property | Arsenic | Hafnium |
---|---|---|
Atomic Volume | 12.95 cm3/mol | 13.44 cm3/mol |
Atomic Radius | 114 pm | 208 pm |
Covalent Radius | 119 pm | 150 pm |
Van der Waals Radius | 185 pm | - |
Atomic Spectrum - Spectral Lines | ||
Emission Spectrum | ||
Absorption Spectrum | ||
Lattice Constant | 375.98, 375.98, 1054.75 pm | 319.64, 319.64, 505.11 pm |
Lattice Angle | π/2, π/2, 2 π/3 | π/2, π/2, 2 π/3 |
Space Group Name | R_ 3m | P63/mmc |
Space Group Number | 166 | 194 |
Crystal Structure | Simple Trigonal | Simple Hexagonal |
Atomic and Orbital Properties
Property | Arsenic | Hafnium |
---|---|---|
Atomic Number | 33 | 72 |
Number of Electrons (with no charge) | 33 | 72 |
Number of Protons | 33 | 72 |
Mass Number | 74.9216 | 178.49 |
Number of Neutrons | 42 | 106 |
Shell structure (Electrons per energy level) | 2, 8, 18, 5 | 2, 8, 18, 32, 10, 2 |
Electron Configuration | [Ar] 3d10 4s2 4p3 | [Xe] 4f14 5d2 6s2 |
Valence Electrons | 4s2 4p3 | 5d2 6s2 |
Oxidation State | -3, 3, 5 | 4 |
Atomic Term Symbol (Quantum Numbers) | 4S3/2 | 3F2 |
Shell structure |
Isotopes and Nuclear Properties
Arsenic has 1 stable naturally occuring isotopes while Hafnium has 5 stable naturally occuring isotopes.
Parameter | Arsenic | Hafnium |
---|---|---|
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 | 153Hf, 154Hf, 155Hf, 156Hf, 157Hf, 158Hf, 159Hf, 160Hf, 161Hf, 162Hf, 163Hf, 164Hf, 165Hf, 166Hf, 167Hf, 168Hf, 169Hf, 170Hf, 171Hf, 172Hf, 173Hf, 174Hf, 175Hf, 176Hf, 177Hf, 178Hf, 179Hf, 180Hf, 181Hf, 182Hf, 183Hf, 184Hf, 185Hf, 186Hf, 187Hf, 188Hf |
Stable Isotopes | Naturally occurring stable isotopes: 75As | Naturally occurring stable isotopes: 176Hf, 177Hf, 178Hf, 179Hf, 180Hf |
Neutron Cross Section | 4.3 | 104 |
Neutron Mass Absorption | 0.002 | 0.02 |
Chemical Properties: Ionization Energies and electron affinity
Property | Arsenic | Hafnium |
---|---|---|
Valence or Valency | 5 | 4 |
Electronegativity | 2.18 Pauling Scale | 1.3 Pauling Scale |
Electron Affinity | 78 kJ/mol | 0 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: 658.5 kJ/mol 2nd: 1440 kJ/mol 3rd: 2250 kJ/mol 4th: 3216 kJ/mol |
Physical Properties
Property | Arsenic | Hafnium |
---|---|---|
Density | 5.727 g/cm3 | 13.31 g/cm3 |
Molar Volume | 12.95 cm3/mol | 13.44 cm3/mol |
Elastic Properties | ||
Young Modulus | 8 | 78 |
Shear Modulus | - | 30 GPa |
Bulk Modulus | 22 GPa | 110 GPa |
Poisson Ratio | - | 0.37 |
Hardness - Tests to Measure of Hardness of Element | ||
Mohs Hardness | 3.5 MPa | 5.5 MPa |
Vickers Hardness | - | 1760 MPa |
Brinell Hardness | 1440 MPa | 1700 MPa |
Electrical Properties | ||
Electrical Conductivity | 3300000 S/m | 3300000 S/m |
Resistivity | 3e-7 m Ω | 3e-7 m Ω |
Superconducting Point | - | 0.128 |
Heat and Conduction Properties | ||
Thermal Conductivity | 50 W/(m K) | 23 W/(m K) |
Thermal Expansion | - | 0.0000059 /K |
Magnetic Properties | ||
Magnetic Type | Diamagnetic | Paramagnetic |
Curie Point | - | - |
Mass Magnetic Susceptibility | -3.9e-9 m3/kg | 5.3e-9 m3/kg |
Molar Magnetic Susceptibility | -2.92e-10 m3/mol | 9.46e-10 m3/mol |
Volume Magnetic Susceptibility | -0.0000223 | 0.0000705 |
Optical Properties | ||
Refractive Index | 1.001552 | - |
Acoustic Properties | ||
Speed of Sound | - | 3010 m/s |
Thermal Properties - Enthalpies and thermodynamics
Property | Arsenic | Hafnium |
---|---|---|
Melting Point | 1090 K | 2506 K |
Boiling Point | 887 K | 4876 K |
Critical Temperature | - | - |
Superconducting Point | - | 0.128 |
Enthalpies | ||
Heat of Fusion | 27.7 kJ/mol | 25.5 kJ/mol |
Heat of Vaporization | 32.4 kJ/mol | 630 kJ/mol |
Heat of Combustion | - | - |
Regulatory and Health - Health and Safety Parameters and Guidelines
Parameter | Arsenic | Hafnium |
---|---|---|
CAS Number | CAS7440-38-2 | CAS7440-58-6 |
RTECS Number | {N/A, RTECSCG0525000, N/A} | RTECSMG4600000 |
DOT Hazard Class | 6.1 | 4.2 |
DOT Numbers | 1558 | 2545 |
EU Number | - | - |
NFPA Fire Rating | 2 | - |
NFPA Health Rating | 3 | - |
NFPA Reactivity Rating | - | - |
NFPA Hazards | - | - |
AutoIgnition Point | - | - |
Flashpoint | - | - |
Compare With Other Elements
Compare Arsenic and Hafnium with other elements of the periodic table.