carbon, hydrogen, magnesium

carbon (chemical element) | hydrogen (chemical element) | magnesium (chemical element)

Periodic table location

Images

| carbon | hydrogen | magnesium atomic symbol | C | H | Mg atomic number | 6 | 1 | 12 short electronic configuration | [He]2s^22p^2 | 1s^1 | [Ne]3s^2 Aufbau diagram | 2p 2s | 1s | 3s block | p | s | s group | 14 | 1 | 2 period | 2 | 1 | 3 atomic mass | 12.011 u | 1.008 u | 24.305 u half-life | (stable) | (stable) | (stable)

| carbon | hydrogen | magnesium phase at STP | solid | gas | solid melting point | 3550 °C | -259.14 °C | 650 °C boiling point | 4027 °C | -252.87 °C | 1090 °C critical temperature | | 32.97 K | (unknown) critical pressure | | 1.293 MPa | (unknown) molar heat of fusion | 105 kJ/mol | 0.558 kJ/mol | 8.7 kJ/mol molar heat of vaporization | 715 kJ/mol | 0.452 kJ/mol | 128 kJ/mol specific heat at STP | 710 J/(kg K) | 14300 J/(kg K) | 1020 J/(kg K) adiabatic index | | 7/5 | (properties at standard conditions)

| carbon | hydrogen | magnesium density | 2.26 g/cm^3 | 8.99×10^-5 g/cm^3 | 1.738 g/cm^3 liquid density | | | 1.584 g/cm^3 molar volume | 5.315 cm^3/mol | 11200 cm^3/mol | 13.98 cm^3/mol Mohs hardness | 0.5 (between talc and gypsum) | | 2.5 (between gypsum and calcite) Brinell hardness | | | 260 MPa bulk modulus | 33 GPa | | 45 GPa shear modulus | | | 17 GPa Young's modulus | | | 45 GPa Poisson ratio | | | 0.29 refractive index | 2.417 | 1.000132 | (unknown) sound speed | 18350 m/s | 1270 m/s | 4602 m/s thermal expansion | 7.1×10^-6 K^(-1) | | 2.5×10^-5 K^(-1) thermal conductivity | 140 W/(m K) | 0.1805 W/(m K) | 160 W/(m K) (properties at standard conditions)

| carbon | hydrogen | magnesium electrical type | conductor | | conductor resistivity | 1×10^-5 Ω m (ohm meters) | | 4.4×10^-8 Ω m (ohm meters) electrical conductivity | 100000 S/m (siemens per meter) | | 2.3×10^7 S/m (siemens per meter) magnetic type | diamagnetic | diamagnetic | paramagnetic volume magnetic susceptibility | -1.4×10^-5 | -2.23×10^-9 | 1.2×10^-5 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) | 6.9×10^-9 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) | 1.68×10^-10 m^3/mol (cubic meters per mole) work function | 5 eV (Polycrystalline) | | 3.66 eV (Polycrystalline) threshold frequency | 1.209×10^15 Hz (hertz) | | 8.85×10^14 Hz (hertz) color | (black) | (colorless) | (silver) refractive index | 2.417 | 1.000132 | (unknown)

| carbon | hydrogen | magnesium valence | 4 | 1 | 2 electronegativity | 2.55 | 2.2 | 1.31 electron affinity | 153.9 kJ/mol (kilojoules per mole) | 72.8 kJ/mol (kilojoules per mole) | 0 kJ/mol (kilojoules per mole) first ionization energy | 1086.5 kJ/mol (kilojoules per mole) | 1312 kJ/mol (kilojoules per mole) | 737.7 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 | 737.7 kJ/mol | 1450.7 kJ/mol | 7732.7 kJ/mol | 10542.5 kJ/mol | 13630 kJ/mol | 18020 kJ/mol | 21711 kJ/mol | 25661 kJ/mol | 31653 kJ/mol | 35458 kJ/mol

Reactivity

| carbon | hydrogen | magnesium term symbol | ^3P_0 | ^2S_(1/2) | ^1S_0 atomic radius | 70 pm | 25 pm | 150 pm covalent radius | 76 pm | 31 pm | 141 pm van der Waals radius | 170 pm | 120 pm | 173 pm (electronic ground state properties)

| carbon | hydrogen | magnesium universe abundance | 0.5 mass% | 75 mass% | 0.06 mass% solar abundance | 0.3 mass% | 75 mass% | 0.07 mass% meteorite abundance | 1.5 mass% | 2.4 mass% | 12 mass% crust abundance | 0.18 mass% | 0.15 mass% | 2.9 mass% ocean abundance | 0.0028 mass% | 11 mass% | 0.13 mass% human abundance | 23 mass% | 10 mass% | 0.027 mass% universe molar abundance | 0.05 mol% | 93 mol% | 0.003 mol% solar molar abundance | 0.03 mol% | 93 mol% | 0.003 mol% meteorite molar abundance | 1.8 mol% | 17 mol% | 10 mol% ocean molar abundance | 0.0014 mol% | 66 mol% | 0.034 mol% crust molar abundance | 0.31 mol% | 3.1 mol% | 2.5 mol% human molar abundance | 12 mol% | 62 mol% | 0.007 mol%

| carbon | hydrogen | magnesium half-life | (stable) | (stable) | (stable) stable isotopes | C-12 (98.89%) | C-13 (1.11%) | H-1 (99.985%) | H-2 (1.5×10^-4) | Mg-24 (78.99%) | Mg-26 (11.01%) | Mg-25 (10%) nuclear spin | C-8: 0^+ | C-9: 3/2^- | C-10: 0^+ | C-11: 3/2^- | C-12: 0^+ | C-13: 1/2^- | C-14: 0^+ | C-15: 1/2^+ | C-16: 0^+ | C-17: 3/2^+ | C-18: 0^+ | C-19: 1/2^+ | C-20: 0^+ | C-21: 1/2^+ | C-22: 0^+ | H-1: 1/2^+ | H-2: 1^+ | H-3: 1/2^+ | H-4: 2^- | H-5: 1/2^+ | H-6: 2^- | H-7: 1/2^+ | Mg-19: 1/2^- | Mg-20: 0^+ | Mg-21: 5/2^+ | Mg-22: 0^+ | Mg-23: 3/2^+ | Mg-24: 0^+ | Mg-25: 5/2^+ | Mg-26: 0^+ | Mg-27: 1/2^+ | Mg-28: 0^+ | Mg-29: 3/2^+ | Mg-30: 0^+ | Mg-31: 1/2^+ | Mg-32: 0^+ | Mg-33: 3/2^+ | Mg-34: 0^+ | Mg-35: 7/2^- | Mg-36: 0^+ | Mg-37: 7/2^- | Mg-38: 0^+ | Mg-39: 7/2^- | Mg-40: 0^+ unstable isotopes | C-14 (5700 yr) | C-11 (20.334 min) | C-10 (19.29 s) | C-15 (2.449 s) | C-16 (747 ms) | C-17 (193 ms) | C-9 (126.5 ms) | C-18 (92 ms) | C-19 (49 ms) | C-20 (14 ms) | C-22 (6.2 ms) | C-21 (30 ns) | C-8 (2 zs) | H-3 (12.32 yr) | H-6 (0.29 zs) | H-4 (0.139 zs) | H-5 (0.08 zs) | H-7 (0.023 zs) | Mg-28 (20.915 h) | Mg-27 (9.458 min) | Mg-23 (11.317 s) | Mg-22 (3.8755 s) | Mg-29 (1.3 s) | Mg-30 (335 ms) | Mg-31 (232 ms) | Mg-21 (122 ms) | Mg-33 (90.5 ms) | Mg-20 (90 ms) | Mg-32 (86 ms) | Mg-35 (70 ms) | Mg-34 (20 ms) | Mg-36 (3.9 ms) | Mg-38 (260 ns) | Mg-37 (260 ns) | Mg-39 (180 ns) | Mg-40 (170 ns) neutron cross-section | 0.0035 b | 0.332 b | 0.063 b neutron mass absorption | 1.5×10^-5 m^2/kg | 0.011 m^2/kg | 1×10^-4 m^2/kg

| carbon | hydrogen | magnesium CAS number | 7440-44-0 | 1333-74-0 | 7439-95-4 PubChem CID number | | 783 | 5462224