Input interpretation
germanium (chemical element) | silicon (chemical element) | neon (chemical element)
Periodic table location
Periodic table location
Images
Images
Basic elemental properties
| germanium | silicon | neon atomic symbol | Ge | Si | Ne atomic number | 32 | 14 | 10 short electronic configuration | [Ar]4s^23d^104p^2 | [Ne]3s^23p^2 | [He]2s^22p^6 Aufbau diagram | 4p 3d 4s | 3p 3s | 2p 2s block | p | p | p group | 14 | 14 | 18 period | 4 | 3 | 2 atomic mass | 72.63 u | 28.085 u | 20.1797 u half-life | (stable) | (stable) | (stable)
Thermodynamic properties
| germanium | silicon | neon phase at STP | solid | solid | gas melting point | 938.3 °C | 1414 °C | -248.59 °C boiling point | 2820 °C | 2900 °C | -246.08 °C critical temperature | (unknown) | | 44.4 K critical pressure | (unknown) | | 2.76 MPa molar heat of fusion | 31.8 kJ/mol | 50.2 kJ/mol | 0.34 kJ/mol molar heat of vaporization | 334 kJ/mol | 359 kJ/mol | 1.75 kJ/mol specific heat at STP | 321.4 J/(kg K) | 710 J/(kg K) | 1030 J/(kg K) adiabatic index | | | 5/3 (properties at standard conditions)
Material properties
| germanium | silicon | neon density | 5.323 g/cm^3 | 2.33 g/cm^3 | 9×10^-4 g/cm^3 liquid density | 5.6 g/cm^3 | 2.57 g/cm^3 | molar volume | 13.64 cm^3/mol | 12.05 cm^3/mol | 22400 cm^3/mol Mohs hardness | 6 (≈ microcline) | 6.5 (between microcline and quartz) | Vickers hardness | 8010 MPa | 9630 MPa | Brinell hardness | 7270 MPa | | bulk modulus | (unknown) | 100 GPa | Young's modulus | (unknown) | 47 GPa | refractive index | (unknown) | | 1.000067 sound speed | 5400 m/s | 2200 m/s | 936 m/s thermal expansion | 6×10^-6 K^(-1) | 2.6×10^-6 K^(-1) | thermal conductivity | 60 W/(m K) | 150 W/(m K) | 0.0491 W/(m K) (properties at standard conditions)
Electromagnetic properties
| germanium | silicon | neon electrical type | semiconductor | semiconductor | resistivity | 5×10^-4 Ω m (ohm meters) | 0.001 Ω m (ohm meters) | electrical conductivity | 2000 S/m (siemens per meter) | 1000 S/m (siemens per meter) | magnetic type | diamagnetic | diamagnetic | diamagnetic volume magnetic susceptibility | -7.98×10^-6 | -3.73×10^-6 | -3.69×10^-9 mass magnetic susceptibility | -1.5×10^-9 m^3/kg (cubic meters per kilogram) | -1.6×10^-9 m^3/kg (cubic meters per kilogram) | -4.1×10^-9 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | -1.09×10^-10 m^3/mol (cubic meters per mole) | -4.49×10^-11 m^3/mol (cubic meters per mole) | -8.27×10^-11 m^3/mol (cubic meters per mole) work function | 5 eV (Polycrystalline) | (4.6 to 4.91) eV | threshold frequency | 1.209×10^15 Hz (hertz) | (1.112×10^15 to 1.187×10^15) Hz (hertz) | color | (gray) | (gray) | (colorless) refractive index | (unknown) | | 1.000067
Reactivity
| germanium | silicon | neon valence | 4 | 4 | 0 electronegativity | 2.01 | 1.9 | electron affinity | 119 kJ/mol (kilojoules per mole) | 133.6 kJ/mol (kilojoules per mole) | 0 kJ/mol (kilojoules per mole) first ionization energy | 762 kJ/mol (kilojoules per mole) | 786.5 kJ/mol (kilojoules per mole) | 2080.7 kJ/mol (kilojoules per mole) ionization energies | 762 kJ/mol | 1537.5 kJ/mol | 3302.1 kJ/mol | 4411 kJ/mol | 9020 kJ/mol | 786.5 kJ/mol | 1577.1 kJ/mol | 3231.6 kJ/mol | 4355.5 kJ/mol | 16091 kJ/mol | 19805 kJ/mol | 23780 kJ/mol | 29287 kJ/mol | 33878 kJ/mol | 38726 kJ/mol | 2080.7 kJ/mol | 3952.3 kJ/mol | 6122 kJ/mol | 9371 kJ/mol | 12177 kJ/mol | 15238 kJ/mol | 19999 kJ/mol | 23069.5 kJ/mol | 115379.5 kJ/mol | 131432 kJ/mol
Reactivity
Atomic properties
| germanium | silicon | neon term symbol | ^3P_0 | ^3P_0 | ^1S_0 atomic radius | 125 pm | 110 pm | 38 pm covalent radius | 120 pm | 111 pm | 58 pm van der Waals radius | (unknown) | 210 pm | 154 pm (electronic ground state properties)
Abundances
| germanium | silicon | neon universe abundance | 2×10^-5 mass% | 0.07 mass% | 0.13 mass% solar abundance | 2×10^-5 mass% | 0.09 mass% | 0.1 mass% meteorite abundance | 0.0021 mass% | 14 mass% | crust abundance | 1.4×10^-4 mass% | 27 mass% | 3×10^-7 mass% ocean abundance | 6×10^-9 mass% | 1×10^-4 mass% | 1.2×10^-8 mass% human abundance | | 0.026 mass% | universe molar abundance | 3×10^-7 mol% | 0.003 mol% | 0.008 mol% solar molar abundance | 3×10^-7 mol% | 0.004 mol% | 0.007 mol% meteorite molar abundance | 4.9×10^-4 mol% | 10 mol% | ocean molar abundance | 5.1×10^-10 mol% | 2.2×10^-5 mol% | 3.7×10^-9 mol% crust molar abundance | 3.9×10^-5 mol% | 20 mol% | 3×10^-7 mol% human molar abundance | | 0.0058 mol% |