selenium vs krypton vs bromine vs rhodium

selenium (chemical element) | krypton (chemical element) | bromine (chemical element) | rhodium (chemical element)

Periodic table location

Images

| atomic symbol | atomic number | short electronic configuration selenium | Se | 34 | [Ar]4s^23d^104p^4 krypton | Kr | 36 | [Ar]4s^23d^104p^6 bromine | Br | 35 | [Ar]4s^23d^104p^5 rhodium | Rh | 45 | [Kr]5s^14d^8 | Aufbau diagram | block | group selenium | 4p 3d 4s | p | 16 krypton | 4p 3d 4s | p | 18 bromine | 4p 3d 4s | p | 17 rhodium | 4d 5s | d | 9 | period | atomic mass | half-life selenium | 4 | 78.971 u | (stable) krypton | 4 | 83.798 u | (stable) bromine | 4 | 79.904 u | (stable) rhodium | 5 | 102.9055 u | (stable)

phase at STP | all | gas | liquid | solid melting point | median | 107 °C | highest | 1964 °C (rhodium) | lowest | -157.36 °C (krypton) | distribution | boiling point | median | 372 °C | highest | 3695 °C (rhodium) | lowest | -153.22 °C (krypton) | distribution | critical temperature | median | 588 K | highest | 1766 K (selenium) | lowest | 209.41 K (krypton) | distribution | critical pressure | median | 10.34 MPa | highest | 27.2 MPa (selenium) | lowest | 5.5 MPa (krypton) | distribution | molar heat of fusion | median | 5.6 kJ/mol | highest | 21.7 kJ/mol (rhodium) | lowest | 1.64 kJ/mol (krypton) | distribution | molar heat of vaporization | median | 20 kJ/mol | highest | 495 kJ/mol (rhodium) | lowest | 9.02 kJ/mol (krypton) specific heat at STP | median | 284.6 J/(kg K) | highest | 947.3 J/(kg K) (bromine) | lowest | 240 J/(kg K) (rhodium) | distribution | (properties at standard conditions)

density | median | 3.97 g/cm^3 | highest | 12.45 g/cm^3 (rhodium) | lowest | 0.00375 g/cm^3 (krypton) liquid density | median | 3.99 g/cm^3 | highest | 10.7 g/cm^3 (rhodium) | lowest | 3.12 g/cm^3 (bromine) molar volume | median | 21 cm^3/mol | highest | 22300 cm^3/mol (krypton) | lowest | 8.2655 cm^3/mol (rhodium) Vickers hardness | all | 1246 MPa Brinell hardness | all | 736 MPa | 1100 MPa bulk modulus | median | 8.3 GPa | highest | 380 GPa (rhodium) | lowest | 1.9 GPa (bromine) Poisson ratio | all | 0.26 | 0.33 refractive index | median | 1.000895 | highest | 1.001132 (bromine) | lowest | 1.000427 (krypton) sound speed | median | 3350 m/s | highest | 4700 m/s (rhodium) | lowest | 1120 m/s (krypton) | distribution | thermal conductivity | median | 0.32 W/(m K) | highest | 150 W/(m K) (rhodium) | lowest | 0.00943 W/(m K) (krypton) (properties at standard conditions)

valence | median | 5.5 | highest | 6 (selenium and rhodium) | lowest | 2 (krypton) | distribution | electronegativity | median | 2.8 | highest | 3 (krypton) | lowest | 2.28 (rhodium) | distribution | electron affinity | median | 152.4 kJ/mol (kilojoules per mole) | highest | 324.6 kJ/mol (kilojoules per mole) (bromine) | lowest | 0 kJ/mol (kilojoules per mole) (krypton) | distribution | first ionization energy | median | 1040 kJ/mol (kilojoules per mole) | highest | 1350.8 kJ/mol (kilojoules per mole) (krypton) | lowest | 719.7 kJ/mol (kilojoules per mole) (rhodium) | distribution |

term symbol | all | ^1S_0 | ^2P_(3/2) | ^3P_2 | ^4F_(9/2) atomic radius | median | 115 pm | highest | 135 pm (rhodium) | lowest | 88 pm (krypton) | distribution | covalent radius | median | 120 pm | highest | 142 pm (rhodium) | lowest | 116 pm (krypton) | distribution | van der Waals radius | median | 190 pm | highest | 202 pm (krypton) | lowest | 185 pm (bromine) | distribution | (electronic ground state properties)

universe abundance | median | 1.8×10^-6 mass% | highest | 4×10^-6 mass% (krypton) | lowest | 6×10^-8 mass% (rhodium) meteorite abundance | median | 1.2×10^-4 mass% | highest | 0.0013 mass% (selenium) | lowest | 1.8×10^-5 mass% (rhodium) crust abundance | median | 2.5×10^-6 mass% | highest | 3×10^-4 mass% (bromine) | lowest | 1.5×10^-8 mass% (krypton) ocean abundance | median | 4.5×10^-8 mass% | highest | 0.0067 mass% (bromine) | lowest | 2.1×10^-8 mass% (krypton) universe molar abundance | median | 3×10^-8 mol% | highest | 6×10^-8 mol% (krypton) | lowest | 7×10^-10 mol% (rhodium) | distribution | meteorite molar abundance | median | 2.3×10^-5 mol% | highest | 2.9×10^-4 mol% (selenium) | lowest | 4×10^-6 mol% (rhodium) ocean molar abundance | median | 3.5×10^-9 mol% | highest | 5.2×10^-4 mol% (bromine) | lowest | 1.6×10^-9 mol% (krypton) crust molar abundance | median | 5×10^-7 mol% | highest | 7.8×10^-5 mol% (bromine) | lowest | 4×10^-9 mol% (krypton)