carbon, hydrogen, chromium

carbon (chemical element) | hydrogen (chemical element) | chromium (chemical element)

Periodic table location

Images

| carbon | hydrogen | chromium atomic symbol | C | H | Cr atomic number | 6 | 1 | 24 short electronic configuration | [He]2s^22p^2 | 1s^1 | [Ar]4s^13d^5 Aufbau diagram | 2p 2s | 1s | 3d 4s block | p | s | d group | 14 | 1 | 6 period | 2 | 1 | 4 atomic mass | 12.011 u | 1.008 u | 51.9961 u half-life | (stable) | (stable) | (stable)

| carbon | hydrogen | chromium phase at STP | solid | gas | solid melting point | 3550 °C | -259.14 °C | 1907 °C boiling point | 4027 °C | -252.87 °C | 2671 °C critical temperature | | 32.97 K | critical pressure | | 1.293 MPa | molar heat of fusion | 105 kJ/mol | 0.558 kJ/mol | 20.5 kJ/mol molar heat of vaporization | 715 kJ/mol | 0.452 kJ/mol | 339 kJ/mol specific heat at STP | 710 J/(kg K) | 14300 J/(kg K) | 448 J/(kg K) adiabatic index | | 7/5 | Néel point | | | 393 K (properties at standard conditions)

| carbon | hydrogen | chromium density | 2.26 g/cm^3 | 8.99×10^-5 g/cm^3 | 7.19 g/cm^3 liquid density | | | 6.3 g/cm^3 molar volume | 5.315 cm^3/mol | 11200 cm^3/mol | 7.232 cm^3/mol Mohs hardness | 0.5 (between talc and gypsum) | | 8.5 (between topaz and corundum) Vickers hardness | | | 1060 MPa Brinell hardness | | | 1120 MPa bulk modulus | 33 GPa | | 160 GPa shear modulus | | | 115 GPa Young's modulus | | | 279 GPa Poisson ratio | | | 0.21 refractive index | 2.417 | 1.000132 | sound speed | 18350 m/s | 1270 m/s | 5940 m/s thermal expansion | 7.1×10^-6 K^(-1) | | 4.9×10^-6 K^(-1) thermal conductivity | 140 W/(m K) | 0.1805 W/(m K) | 94 W/(m K) (properties at standard conditions)

| carbon | hydrogen | chromium electrical type | conductor | | conductor resistivity | 1×10^-5 Ω m (ohm meters) | | 1.3×10^-7 Ω m (ohm meters) electrical conductivity | 100000 S/m (siemens per meter) | | 7.9×10^6 S/m (siemens per meter) magnetic type | diamagnetic | diamagnetic | antiferromagnetic volume magnetic susceptibility | -1.4×10^-5 | -2.23×10^-9 | 3.177×10^-4 mass magnetic susceptibility | -6.2×10^-9 m^3/kg (cubic meters per kilogram) | -2.48×10^-8 m^3/kg (cubic meters per kilogram) | 4.45×10^-8 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | -7.45×10^-11 m^3/mol (cubic meters per mole) | -4.999×10^-11 m^3/mol (cubic meters per mole) | 2.314×10^-9 m^3/mol (cubic meters per mole) Néel point | | | 393 K (kelvins) work function | 5 eV (Polycrystalline) | | 4.5 eV (Polycrystalline) threshold frequency | 1.209×10^15 Hz (hertz) | | 1.088×10^15 Hz (hertz) color | (black) | (colorless) | (silver) refractive index | 2.417 | 1.000132 |

| carbon | hydrogen | chromium valence | 4 | 1 | 6 electronegativity | 2.55 | 2.2 | 1.66 electron affinity | 153.9 kJ/mol (kilojoules per mole) | 72.8 kJ/mol (kilojoules per mole) | 64.3 kJ/mol (kilojoules per mole) first ionization energy | 1086.5 kJ/mol (kilojoules per mole) | 1312 kJ/mol (kilojoules per mole) | 652.9 kJ/mol (kilojoules per mole) ionization energies | 1086.5 kJ/mol | 2352.6 kJ/mol | 4620.5 kJ/mol | 6222.7 kJ/mol | 37831 kJ/mol | 47277 kJ/mol | 1312 kJ/mol | 652.9 kJ/mol | 1590.6 kJ/mol | 2987 kJ/mol | 4743 kJ/mol | 6702 kJ/mol | 8744.9 kJ/mol | 15455 kJ/mol | 17820 kJ/mol | 20190 kJ/mol | 23580 kJ/mol | 26130 kJ/mol | 28750 kJ/mol | 34230 kJ/mol | 37066 kJ/mol | 97510 kJ/mol | 105800 kJ/mol | 114300 kJ/mol | 125300 kJ/mol | 134700 kJ/mol | 144300 kJ/mol | 157700 kJ/mol

Reactivity

| carbon | hydrogen | chromium term symbol | ^3P_0 | ^2S_(1/2) | ^7S_3 atomic radius | 70 pm | 25 pm | 140 pm covalent radius | 76 pm | 31 pm | 139 pm van der Waals radius | 170 pm | 120 pm | (electronic ground state properties)

| carbon | hydrogen | chromium universe abundance | 0.5 mass% | 75 mass% | 0.0015 mass% solar abundance | 0.3 mass% | 75 mass% | 0.002 mass% meteorite abundance | 1.5 mass% | 2.4 mass% | 0.3 mass% crust abundance | 0.18 mass% | 0.15 mass% | 0.014 mass% ocean abundance | 0.0028 mass% | 11 mass% | 6×10^-8 mass% human abundance | 23 mass% | 10 mass% | 3×10^-6 mass% universe molar abundance | 0.05 mol% | 93 mol% | 4×10^-5 mol% solar molar abundance | 0.03 mol% | 93 mol% | 4×10^-5 mol% meteorite molar abundance | 1.8 mol% | 17 mol% | 0.12 mol% ocean molar abundance | 0.0014 mol% | 66 mol% | 7.1×10^-9 mol% crust molar abundance | 0.31 mol% | 3.1 mol% | 0.0055 mol% human molar abundance | 12 mol% | 62 mol% | 4×10^-7 mol%