Periodic Table Element Comparison: Compare Elements - Selenium vs Xenon
Compare Selenium and Xenon 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 Selenium vs Xenon with most reliable information about their properties, attributes, facts, uses etc. You can compare Se vs Xe on more than 90 properties like electronegativity , oxidation state, atomic shells, orbital structure, Electronaffinity, physical states, electrical conductivity and many more. Selenium and Xenon comparison table on more than 90 properties.
Selenium and Xenon Comparison
Facts
Name | Selenium | Xenon |
---|---|---|
Atomic Number | 34 | 54 |
Atomic Symbol | Se | Xe |
Atomic Weight | 78.96 | 131.293 |
Phase at STP | Solid | Gas |
Color | Gray | Colorless |
Metallic Classification | Other Nonmetal | Noble Gas |
Group in Periodic Table | group 16 | group 18 |
Group Name | oxygen family | helium family or neon family |
Period in Periodic Table | period 4 | period 5 |
Block in Periodic Table | p -block | p -block |
Electronic Configuration | [Ar] 3d10 4s2 4p4 | [Kr] 4d10 5s2 5p6 |
Electronic Shell Structure (Electrons per shell) | 2, 8, 18, 6 | 2, 8, 18, 18, 8 |
Melting Point | 494 K | 161.3 K |
Boiling Point | 958 K | 165.1 K |
CAS Number | CAS7782-49-2 | CAS7440-63-3 |
Neighborhood Elements | Neighborhood Elements of Selenium | Neighborhood Elements of Xenon |
History
Parameter | Selenium | Xenon |
---|---|---|
History | The element Selenium was discovered by J. Berzelius and G. Gahn in year 1817 in Sweden. Selenium derived its name from the Greek selene, meaning 'moon'. | The element Xenon was discovered by W. Ramsay and W. Travers in year 1898 in United Kingdom. Xenon derived its name from the Greek xenos, meaning 'strange'. |
Discovery | J. Berzelius and G. Gahn (1817) | W. Ramsay and W. Travers (1898) |
Isolated | J. Berzelius and G. Gahn (1817) | W. Ramsay and W. Travers (1898) |
Presence: Abundance in Nature and Around Us
Parts per billion (ppb) by weight / by atoms (1ppb =10^-7 %)
Property | Selenium | Xenon |
---|---|---|
Abundance in Universe | 30 / 0.5 | 10 / 0.09 |
Abundance in Sun | - / - | - / - |
Abundance in Meteorites | 13000 / 2900 | - / - |
Abundance in Earth's Crust | 50 / 10 | 0.020 / 0.003 |
Abundance in Oceans | 0.45 / 0.035 | 0.005 / 0.00024 |
Abundance in Humans | 50 / 4 | - / - |
Crystal Structure and Atomic Structure
Property | Selenium | Xenon |
---|---|---|
Atomic Volume | 16.385 cm3/mol | 22.4128 cm3/mol |
Atomic Radius | 103 pm | 108 pm |
Covalent Radius | 116 pm | 130 pm |
Van der Waals Radius | 190 pm | 216 pm |
Atomic Spectrum - Spectral Lines | ||
Emission Spectrum | ![]() | ![]() |
Absorption Spectrum | ![]() | ![]() |
Lattice Constant | 905.4, 908.3, 1160.1 pm | 620.23, 620.23, 620.23 pm |
Lattice Angle | π/2, 1.58493, π/2 | π/2, π/2, π/2 |
Space Group Name | P121/c1 | Fm_ 3m |
Space Group Number | 14 | 225 |
Crystal Structure | Simple Monoclinic ![]() | Face Centered Cubic ![]() |
Atomic and Orbital Properties
Property | Selenium | Xenon |
---|---|---|
Atomic Number | 34 | 54 |
Number of Electrons (with no charge) | 34 | 54 |
Number of Protons | 34 | 54 |
Mass Number | 78.96 | 131.293 |
Number of Neutrons | 45 | 77 |
Shell structure (Electrons per energy level) | 2, 8, 18, 6 | 2, 8, 18, 18, 8 |
Electron Configuration | [Ar] 3d10 4s2 4p4 | [Kr] 4d10 5s2 5p6 |
Valence Electrons | 4s2 4p4 | 5s2 5p6 |
Oxidation State | -2, 2, 4, 6 | 0 |
Atomic Term Symbol (Quantum Numbers) | 3P2 | 1S0 |
Shell structure | ![]() | ![]() |
Isotopes and Nuclear Properties
Selenium has 5 stable naturally occuring isotopes while Xenon has 9 stable naturally occuring isotopes.
Parameter | Selenium | Xenon |
---|---|---|
Known Isotopes | 65Se, 66Se, 67Se, 68Se, 69Se, 70Se, 71Se, 72Se, 73Se, 74Se, 75Se, 76Se, 77Se, 78Se, 79Se, 80Se, 81Se, 82Se, 83Se, 84Se, 85Se, 86Se, 87Se, 88Se, 89Se, 90Se, 91Se, 92Se, 93Se, 94Se | 110Xe, 111Xe, 112Xe, 113Xe, 114Xe, 115Xe, 116Xe, 117Xe, 118Xe, 119Xe, 120Xe, 121Xe, 122Xe, 123Xe, 124Xe, 125Xe, 126Xe, 127Xe, 128Xe, 129Xe, 130Xe, 131Xe, 132Xe, 133Xe, 134Xe, 135Xe, 136Xe, 137Xe, 138Xe, 139Xe, 140Xe, 141Xe, 142Xe, 143Xe, 144Xe, 145Xe, 146Xe, 147Xe |
Stable Isotopes | Naturally occurring stable isotopes: 74Se, 76Se, 77Se, 78Se, 80Se | Naturally occurring stable isotopes: 124Xe, 126Xe, 128Xe, 129Xe, 130Xe, 131Xe, 132Xe, 134Xe, 136Xe |
Neutron Cross Section | 11.7 | 25 |
Neutron Mass Absorption | 0.0056 | 0.0083 |
Chemical Properties: Ionization Energies and electron affinity
Property | Selenium | Xenon |
---|---|---|
Valence or Valency | 6 | 6 |
Electronegativity | 2.55 Pauling Scale | 2.6 Pauling Scale |
Electron Affinity | 195 kJ/mol | 0 kJ/mol |
Ionization Energies | 1st: 941 kJ/mol 2nd: 2045 kJ/mol 3rd: 2973.7 kJ/mol 4th: 4144 kJ/mol 5th: 6590 kJ/mol 6th: 7880 kJ/mol 7th: 14990 kJ/mol | 1st: 1170.4 kJ/mol 2nd: 2046.4 kJ/mol 3rd: 3099.4 kJ/mol |
Physical Properties
Property | Selenium | Xenon |
---|---|---|
Density | 4.819 g/cm3 | 0.0059 g/cm3 |
Molar Volume | 16.385 cm3/mol | 22.4128 cm3/mol |
Elastic Properties | ||
Young Modulus | 10 | - |
Shear Modulus | 3.7 GPa | - |
Bulk Modulus | 8.3 GPa | - |
Poisson Ratio | 0.33 | - |
Hardness - Tests to Measure of Hardness of Element | ||
Mohs Hardness | 2 MPa | - |
Vickers Hardness | - | - |
Brinell Hardness | 736 MPa | - |
Electrical Properties | ||
Electrical Conductivity | - | - |
Resistivity | - | - |
Superconducting Point | - | - |
Heat and Conduction Properties | ||
Thermal Conductivity | 0.52 W/(m K) | 0.00565 W/(m K) |
Thermal Expansion | - | - |
Magnetic Properties | ||
Magnetic Type | Diamagnetic | Diamagnetic |
Curie Point | - | - |
Mass Magnetic Susceptibility | -4e-9 m3/kg | -4.3e-9 m3/kg |
Molar Magnetic Susceptibility | -3.16e-10 m3/mol | -5.65e-10 m3/mol |
Volume Magnetic Susceptibility | -0.0000193 | -2.54e-8 |
Optical Properties | ||
Refractive Index | 1.000895 | 1.000702 |
Acoustic Properties | ||
Speed of Sound | 3350 m/s | 1090 m/s |
Thermal Properties - Enthalpies and thermodynamics
Property | Selenium | Xenon |
---|---|---|
Melting Point | 494 K | 161.3 K |
Boiling Point | 958 K | 165.1 K |
Critical Temperature | 1766 K | 289.77 K |
Superconducting Point | - | - |
Enthalpies | ||
Heat of Fusion | 5.4 kJ/mol | 2.3 kJ/mol |
Heat of Vaporization | 26 kJ/mol | 12.64 kJ/mol |
Heat of Combustion | - | - |
Regulatory and Health - Health and Safety Parameters and Guidelines
Parameter | Selenium | Xenon |
---|---|---|
CAS Number | CAS7782-49-2 | CAS7440-63-3 |
RTECS Number | {N/A, RTECSVS7700000, N/A} | RTECSZE1280000 |
DOT Hazard Class | 6.1 | 2.2 |
DOT Numbers | 2658 | 2591 |
EU Number | - | EU231-172-7 |
NFPA Fire Rating | 0 | - |
NFPA Health Rating | 2 | - |
NFPA Reactivity Rating | 0 | - |
NFPA Hazards | - | - |
AutoIgnition Point | - | - |
Flashpoint | - | - |
Compare With Other Elements
Compare Selenium and Xenon with other elements of the periodic table.