Periodic Table Element Comparison: Compare Elements - Chromium vs Krypton
Compare Chromium and Krypton 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 Chromium vs Krypton with most reliable information about their properties, attributes, facts, uses etc. You can compare Cr vs Kr on more than 90 properties like electronegativity , oxidation state, atomic shells, orbital structure, Electronaffinity, physical states, electrical conductivity and many more. Chromium and Krypton comparison table on more than 90 properties.
Chromium and Krypton Comparison
Facts
| Name | Chromium | Krypton |
|---|---|---|
| Atomic Number | 24 | 36 |
| Atomic Symbol | Cr | Kr |
| Atomic Weight | 51.9961 | 83.798 |
| Phase at STP | Solid | Gas |
| Color | Silver | Colorless |
| Metallic Classification | Transition Metal | Noble Gas |
| Group in Periodic Table | group 6 | group 18 |
| Group Name | chromium family | helium family or neon family |
| Period in Periodic Table | period 4 | period 4 |
| Block in Periodic Table | d -block | p -block |
| Electronic Configuration | [Ar] 3d5 4s1 | [Ar] 3d10 4s2 4p6 |
| Electronic Shell Structure (Electrons per shell) | 2, 8, 13, 1 | 2, 8, 18, 8 |
| Melting Point | 2180 K | 115.79 K |
| Boiling Point | 2944 K | 119.93 K |
| CAS Number | CAS7440-47-3 | CAS7439-90-9 |
| Neighborhood Elements | Neighborhood Elements of Chromium | Neighborhood Elements of Krypton |
History
| Parameter | Chromium | Krypton |
|---|---|---|
| History | The element Chromium was discovered by N. Vauquelin in year 1797 in France. Chromium derived its name from the Greek word chroma, meaning 'color'. | The element Krypton was discovered by W. Ramsay and W. Travers in year 1898 in United Kingdom. Krypton derived its name from the Greek kryptos, meaning 'hidden'. |
| Discovery | N. Vauquelin (1797) | W. Ramsay and W. Travers (1898) |
| Isolated | N. Vauquelin (1798) | 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 | Chromium | Krypton |
|---|---|---|
| Abundance in Universe | 15000 / 400 | 40 / 0.6 |
| Abundance in Sun | 20000 / 400 | - / - |
| Abundance in Meteorites | 3100000 / 1200000 | - / - |
| Abundance in Earth's Crust | 140000 / 55000 | 0.15 / 0.04 |
| Abundance in Oceans | 0.6 / 0.071 | 0.21 / 0.016 |
| Abundance in Humans | 30 / 4 | - / - |
Crystal Structure and Atomic Structure
| Property | Chromium | Krypton |
|---|---|---|
| Atomic Volume | 7.2824 cm3/mol | 22.35 cm3/mol |
| Atomic Radius | 166 pm | 88 pm |
| Covalent Radius | 127 pm | 110 pm |
| Van der Waals Radius | - | 202 pm |
Atomic Spectrum - Spectral Lines | ||
| Emission Spectrum |  |  |
| Absorption Spectrum |  |  |
| Lattice Constant | 291, 291, 291 pm | 570.6, 570.6, 570.6 pm |
| Lattice Angle | π/2, π/2, π/2 | π/2, π/2, π/2 |
| Space Group Name | Im_ 3m | Fm_ 3m |
| Space Group Number | 229 | 225 |
| Crystal Structure | Body Centered Cubic  | Face Centered Cubic  |
Atomic and Orbital Properties
| Property | Chromium | Krypton |
|---|---|---|
| Atomic Number | 24 | 36 |
| Number of Electrons (with no charge) | 24 | 36 |
| Number of Protons | 24 | 36 |
| Mass Number | 51.9961 | 83.798 |
| Number of Neutrons | 28 | 48 |
| Shell structure (Electrons per energy level) | 2, 8, 13, 1 | 2, 8, 18, 8 |
| Electron Configuration | [Ar] 3d5 4s1 | [Ar] 3d10 4s2 4p6 |
| Valence Electrons | 3d5 4s1 | 4s2 4p6 |
| Oxidation State | 2, 3, 6 | 0 |
| Atomic Term Symbol (Quantum Numbers) | 7S3 | 1S0 |
| Shell structure |  |  |
Isotopes and Nuclear Properties
Chromium has 4 stable naturally occuring isotopes while Krypton has 6 stable naturally occuring isotopes.
| Parameter | Chromium | Krypton |
|---|---|---|
| Known Isotopes | 42Cr, 43Cr, 44Cr, 45Cr, 46Cr, 47Cr, 48Cr, 49Cr, 50Cr, 51Cr, 52Cr, 53Cr, 54Cr, 55Cr, 56Cr, 57Cr, 58Cr, 59Cr, 60Cr, 61Cr, 62Cr, 63Cr, 64Cr, 65Cr, 66Cr, 67Cr | 69Kr, 70Kr, 71Kr, 72Kr, 73Kr, 74Kr, 75Kr, 76Kr, 77Kr, 78Kr, 79Kr, 80Kr, 81Kr, 82Kr, 83Kr, 84Kr, 85Kr, 86Kr, 87Kr, 88Kr, 89Kr, 90Kr, 91Kr, 92Kr, 93Kr, 94Kr, 95Kr, 96Kr, 97Kr, 98Kr, 99Kr, 100Kr |
| Stable Isotopes | Naturally occurring stable isotopes: 50Cr, 52Cr, 53Cr, 54Cr | Naturally occurring stable isotopes: 78Kr, 80Kr, 82Kr, 83Kr, 84Kr, 86Kr |
| Neutron Cross Section | 3.1 | 25 |
| Neutron Mass Absorption | 0.0021 | 0.013 |
Chemical Properties: Ionization Energies and electron affinity
| Property | Chromium | Krypton |
|---|---|---|
| Valence or Valency | 6 | 2 |
| Electronegativity | 1.66 Pauling Scale | 3 Pauling Scale |
| Electron Affinity | 64.3 kJ/mol | 0 kJ/mol |
| Ionization Energies | 1st: 652.9 kJ/mol 2nd: 1590.6 kJ/mol 3rd: 2987 kJ/mol 4th: 4743 kJ/mol 5th: 6702 kJ/mol 6th: 8744.9 kJ/mol 7th: 15455 kJ/mol 8th: 17820 kJ/mol 9th: 20190 kJ/mol 10th: 23580 kJ/mol 11th: 26130 kJ/mol 12th: 28750 kJ/mol 13th: 34230 kJ/mol 14th: 37066 kJ/mol 15th: 97510 kJ/mol 16th: 105800 kJ/mol 17th: 114300 kJ/mol 18th: 125300 kJ/mol 19th: 134700 kJ/mol 20th: 144300 kJ/mol 21st: 157700 kJ/mol 22nd: 166090 kJ/mol 23rd: 721870 kJ/mol 24th: 761733 kJ/mol | 1st: 1350.8 kJ/mol 2nd: 2350.4 kJ/mol 3rd: 3565 kJ/mol 4th: 5070 kJ/mol 5th: 6240 kJ/mol 6th: 7570 kJ/mol 7th: 10710 kJ/mol 8th: 12138 kJ/mol 9th: 22274 kJ/mol 10th: 25880 kJ/mol 11th: 29700 kJ/mol 12th: 33800 kJ/mol 13th: 37700 kJ/mol 14th: 43100 kJ/mol 15th: 47500 kJ/mol 16th: 52200 kJ/mol 17th: 57100 kJ/mol 18th: 61800 kJ/mol 19th: 75800 kJ/mol 20th: 80400 kJ/mol 21st: 85300 kJ/mol 22nd: 90400 kJ/mol 23rd: 96300 kJ/mol 24th: 101400 kJ/mol 25th: 111100 kJ/mol 26th: 116290 kJ/mol 27th: 282500 kJ/mol 28th: 296200 kJ/mol 29th: 311400 kJ/mol 30th: 326200 kJ/mol |
Physical Properties
| Property | Chromium | Krypton |
|---|---|---|
| Density | 7.14 g/cm3 | 0.00375 g/cm3 |
| Molar Volume | 7.2824 cm3/mol | 22.35 cm3/mol |
Elastic Properties | ||
| Young Modulus | 279 | - |
| Shear Modulus | 115 GPa | - |
| Bulk Modulus | 160 GPa | - |
| Poisson Ratio | 0.21 | - |
Hardness - Tests to Measure of Hardness of Element | ||
| Mohs Hardness | 8.5 MPa | - |
| Vickers Hardness | 1060 MPa | - |
| Brinell Hardness | 1120 MPa | - |
Electrical Properties | ||
| Electrical Conductivity | 7900000 S/m | - |
| Resistivity | 1.3e-7 m Ω | - |
| Superconducting Point | - | - |
Heat and Conduction Properties | ||
| Thermal Conductivity | 94 W/(m K) | 0.00943 W/(m K) |
| Thermal Expansion | 0.0000049 /K | - |
Magnetic Properties | ||
| Magnetic Type | Antiferromagnetic | Diamagnetic |
| Curie Point | - | - |
| Mass Magnetic Susceptibility | 4.45e-8 m3/kg | -4.4e-9 m3/kg |
| Molar Magnetic Susceptibility | 2.314e-9 m3/mol | -3.69e-10 m3/mol |
| Volume Magnetic Susceptibility | 0.0003177 | -1.65e-8 |
Optical Properties | ||
| Refractive Index | - | 1.000427 |
Acoustic Properties | ||
| Speed of Sound | 5940 m/s | 1120 m/s |
Thermal Properties - Enthalpies and thermodynamics
| Property | Chromium | Krypton |
|---|---|---|
| Melting Point | 2180 K | 115.79 K |
| Boiling Point | 2944 K | 119.93 K |
| Critical Temperature | - | 209.41 K |
| Superconducting Point | - | - |
Enthalpies | ||
| Heat of Fusion | 20.5 kJ/mol | 1.64 kJ/mol |
| Heat of Vaporization | 339 kJ/mol | 9.02 kJ/mol |
| Heat of Combustion | - | - |
Regulatory and Health - Health and Safety Parameters and Guidelines
| Parameter | Chromium | Krypton |
|---|---|---|
| CAS Number | CAS7440-47-3 | CAS7439-90-9 |
| RTECS Number | RTECSGB4200000 | RTECSOC6772500 |
| DOT Hazard Class | 4.1 | 2.2 |
| DOT Numbers | 3089 | 1970 |
| EU Number | - | EU231-098-5 |
| NFPA Fire Rating | 1 | - |
| NFPA Health Rating | 2 | - |
| NFPA Reactivity Rating | 1 | - |
| NFPA Hazards | - | - |
| AutoIgnition Point | 400 °C | - |
| Flashpoint | - | - |
Compare With Other Elements
Compare Chromium and Krypton with other elements of the periodic table.