copper vs krypton vs germanium vs selenium

copper (chemical element) | krypton (chemical element) | germanium (chemical element) | selenium (chemical element)

Periodic table location

Images

| atomic symbol | atomic number | short electronic configuration copper | Cu | 29 | [Ar]4s^13d^10 krypton | Kr | 36 | [Ar]4s^23d^104p^6 germanium | Ge | 32 | [Ar]4s^23d^104p^2 selenium | Se | 34 | [Ar]4s^23d^104p^4 | Aufbau diagram | block | group copper | 3d 4s | d | 11 krypton | 4p 3d 4s | p | 18 germanium | 4p 3d 4s | p | 14 selenium | 4p 3d 4s | p | 16 | period | atomic mass | half-life copper | 4 | 63.546 u | (stable) krypton | 4 | 83.798 u | (stable) germanium | 4 | 72.63 u | (stable) selenium | 4 | 78.971 u | (stable)

phase at STP | all | gas | solid melting point | median | 580 °C | highest | 1084.62 °C (copper) | lowest | -157.36 °C (krypton) | distribution | boiling point | median | 1624 °C | highest | 2820 °C (germanium) | lowest | -153.22 °C (krypton) | distribution | molar heat of fusion | median | 9.3 kJ/mol | highest | 31.8 kJ/mol (germanium) | lowest | 1.64 kJ/mol (krypton) | distribution | molar heat of vaporization | median | 160 kJ/mol | highest | 334 kJ/mol (germanium) | lowest | 9.02 kJ/mol (krypton) specific heat at STP | median | 321.3 J/(kg K) | highest | 384.4 J/(kg K) (copper) | lowest | 248.05 J/(kg K) (krypton) | distribution | (properties at standard conditions)

density | median | 5.071 g/cm^3 | highest | 8.96 g/cm^3 (copper) | lowest | 0.00375 g/cm^3 (krypton) | distribution | liquid density | median | 5.6 g/cm^3 | highest | 8.02 g/cm^3 (copper) | lowest | 3.99 g/cm^3 (selenium) | distribution | molar volume | median | 15.02 cm^3/mol | highest | 22300 cm^3/mol (krypton) | lowest | 7.092 cm^3/mol (copper) Mohs hardness | median | 3 | highest | 6 (≈ microcline) (germanium) | lowest | 2 (≈ gypsum) (selenium) | distribution | Vickers hardness | all | 369 MPa | 8010 MPa Brinell hardness | all | 736 MPa | 874 MPa | 7270 MPa Poisson ratio | all | 0.33 | 0.34 sound speed | median | 3460 m/s | highest | 5400 m/s (germanium) | lowest | 1120 m/s (krypton) | distribution | thermal conductivity | median | 30 W/(m K) | highest | 400 W/(m K) (copper) | lowest | 0.00943 W/(m K) (krypton) (properties at standard conditions)

valence | median | 3 | highest | 6 (selenium) | lowest | 2 (copper and krypton) | distribution | electronegativity | median | 2.28 | highest | 3 (krypton) | lowest | 1.9 (copper) | distribution | electron affinity | median | 119 kJ/mol (kilojoules per mole) | highest | 195 kJ/mol (kilojoules per mole) (selenium) | lowest | 0 kJ/mol (kilojoules per mole) (krypton) | distribution | first ionization energy | median | 851 kJ/mol (kilojoules per mole) | highest | 1350.8 kJ/mol (kilojoules per mole) (krypton) | lowest | 745.5 kJ/mol (kilojoules per mole) (copper) | distribution |

term symbol | all | ^1S_0 | ^2S_(1/2) | ^3P_0 | ^3P_2 atomic radius | median | 120 pm | highest | 135 pm (copper) | lowest | 88 pm (krypton) | distribution | covalent radius | median | 120 pm | highest | 132 pm (copper) | lowest | 116 pm (krypton) | distribution | van der Waals radius | median | 190 pm | highest | 202 pm (krypton) | lowest | 140 pm (copper) | distribution | (electronic ground state properties)

universe abundance | median | 5×10^-6 mass% | highest | 2×10^-5 mass% (germanium) | lowest | 3×10^-6 mass% (selenium) | distribution | meteorite abundance | median | 0.0021 mass% | highest | 0.011 mass% (copper) | lowest | 0.0013 mass% (selenium) crust abundance | median | 7.2×10^-5 mass% | highest | 0.0068 mass% (copper) | lowest | 1.5×10^-8 mass% (krypton) ocean abundance | median | 3.3×10^-8 mass% | highest | 3×10^-7 mass% (copper) | lowest | 6×10^-9 mass% (germanium) universe molar abundance | median | 8×10^-8 mol% | highest | 3×10^-7 mol% (germanium) | lowest | 5×10^-8 mol% (selenium) | distribution | meteorite molar abundance | median | 4.9×10^-4 mol% | highest | 0.0031 mol% (copper) | lowest | 2.9×10^-4 mol% (selenium) ocean molar abundance | median | 2.5×10^-9 mol% | highest | 2.9×10^-8 mol% (copper) | lowest | 5.1×10^-10 mol% (germanium) crust molar abundance | median | 2×10^-5 mol% | highest | 0.0022 mol% (copper) | lowest | 4×10^-9 mol% (krypton)