element types of hafnium(II) hydride

hafnium(II) hydride | element types

hydrogen | hafnium

Periodic table location

Images

| hydrogen | hafnium atomic symbol | H | Hf atomic number | 1 | 72 short electronic configuration | 1s^1 | [Xe]6s^24f^145d^2 Aufbau diagram | 1s | 5d 4f 6s block | s | d group | 1 | 4 period | 1 | 6 atomic mass | 1.008 u | 178.49 u half-life | (stable) | (stable)

| hydrogen | hafnium phase at STP | gas | solid melting point | -259.14 °C | 2233 °C boiling point | -252.87 °C | 4603 °C critical temperature | 32.97 K | critical pressure | 1.293 MPa | molar heat of fusion | 0.558 kJ/mol | 25.5 kJ/mol molar heat of vaporization | 0.452 kJ/mol | 630 kJ/mol specific heat at STP | 14300 J/(kg K) | 144 J/(kg K) adiabatic index | 7/5 | (properties at standard conditions)

| hydrogen | hafnium density | 8.99×10^-5 g/cm^3 | 13.31 g/cm^3 liquid density | | 12 g/cm^3 molar volume | 11200 cm^3/mol | 13.41 cm^3/mol Mohs hardness | | 5.5 (between apatite and microcline) Vickers hardness | | 1760 MPa Brinell hardness | | 1700 MPa bulk modulus | | 110 GPa shear modulus | | 30 GPa Young's modulus | | 78 GPa Poisson ratio | | 0.37 refractive index | 1.000132 | sound speed | 1270 m/s | 3010 m/s thermal expansion | | 5.9×10^-6 K^(-1) thermal conductivity | 0.1805 W/(m K) | 23 W/(m K) (properties at standard conditions)

| hydrogen | hafnium electrical type | | conductor resistivity | | 3×10^-7 Ω m (ohm meters) electrical conductivity | | 3.3×10^6 S/m (siemens per meter) magnetic type | diamagnetic | paramagnetic volume magnetic susceptibility | -2.23×10^-9 | 7.05×10^-5 mass magnetic susceptibility | -2.48×10^-8 m^3/kg (cubic meters per kilogram) | 5.3×10^-9 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | -4.999×10^-11 m^3/mol (cubic meters per mole) | 9.46×10^-10 m^3/mol (cubic meters per mole) work function | | 3.9 eV (Polycrystalline) threshold frequency | | 9.43×10^14 Hz (hertz) superconducting point | | 0.128 K (kelvins) color | (colorless) | (gray) refractive index | 1.000132 |

| hydrogen | hafnium valence | 1 | 4 electronegativity | 2.2 | 1.3 electron affinity | 72.8 kJ/mol (kilojoules per mole) | 0 kJ/mol (kilojoules per mole) first ionization energy | 1312 kJ/mol (kilojoules per mole) | 658.5 kJ/mol (kilojoules per mole) ionization energies | 1312 kJ/mol | 658.5 kJ/mol | 1440 kJ/mol | 2250 kJ/mol | 3216 kJ/mol

Reactivity

| hydrogen | hafnium term symbol | ^2S_(1/2) | ^3F_2 atomic radius | 25 pm | 155 pm covalent radius | 31 pm | 175 pm van der Waals radius | 120 pm | (electronic ground state properties)

| hydrogen | hafnium universe abundance | 75 mass% | 7×10^-8 mass% solar abundance | 75 mass% | 1×10^-7 mass% meteorite abundance | 2.4 mass% | 1.7×10^-5 mass% crust abundance | 0.15 mass% | 3.3×10^-4 mass% ocean abundance | 11 mass% | 8×10^-10 mass% human abundance | 10 mass% | universe molar abundance | 93 mol% | 5×10^-10 mol% solar molar abundance | 93 mol% | 9.9×10^-10 mol% meteorite molar abundance | 17 mol% | 2×10^-6 mol% ocean molar abundance | 66 mol% | 2.8×10^-11 mol% crust molar abundance | 3.1 mol% | 3.8×10^-5 mol% human molar abundance | 62 mol% |

| hydrogen | hafnium half-life | (stable) | (stable) stable isotopes | H-1 (99.985%) | H-2 (1.5×10^-4) | Hf-180 (35.08%) | Hf-178 (27.28%) | Hf-177 (18.6%) | Hf-179 (13.62%) | Hf-176 (5.26%) nuclear spin | 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^+ | Hf-153: 1/2^+ | Hf-154: 0^+ | Hf-155: 7/2^- | Hf-156: 0^+ | Hf-157: 7/2^- | Hf-158: 0^+ | Hf-159: 7/2^- | Hf-160: 0^+ | Hf-161: 3/2^- | Hf-162: 0^+ | Hf-163: 3/2^- | Hf-164: 0^+ | Hf-165: 5/2^- | Hf-166: 0^+ | Hf-167: 5/2^- | Hf-168: 0^+ | Hf-169: 5/2^- | Hf-170: 0^+ | Hf-171: 7/2^+ | Hf-172: 0^+ | Hf-173: 1/2^- | Hf-174: 0^+ | Hf-175: 5/2^- | Hf-176: 0^+ | Hf-177: 7/2^- | Hf-178: 0^+ | Hf-179: 9/2^+ | Hf-180: 0^+ | Hf-181: 1/2^- | Hf-182: 0^+ | Hf-183: 3/2^- | Hf-184: 0^+ | Hf-185: 3/2^- | Hf-186: 0^+ | Hf-187: 3/2^- | Hf-188: 0^+ unstable isotopes | 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) | Hf-174 (2 quadrillion yr) | Hf-182 (8.9 Myr) | Hf-172 (1.9 yr) | Hf-175 (69 days) | Hf-181 (42.38 days) | Hf-173 (24 h) | Hf-170 (16.011 h) | Hf-171 (12.1 h) | Hf-184 (4.11 h) | Hf-183 (64.02 min) | Hf-168 (25.95 min) | Hf-166 (6.77 min) | Hf-185 (210 s) | Hf-169 (194 s) | Hf-186 (160 s) | Hf-167 (123 s) | Hf-164 (111 s) | Hf-165 (76 s) | Hf-163 (40 s) | Hf-162 (39.4 s) | Hf-187 (30 s) | Hf-188 (20 s) | Hf-161 (18.2 s) | Hf-160 (13.6 s) | Hf-159 (5.6 s) | Hf-158 (2.85 s) | Hf-154 (2 s) | Hf-155 (890 ms) | Hf-157 (110 ms) | Hf-156 (23 ms) | Hf-153 (60 ns) neutron cross-section | 0.332 b | 104 b neutron mass absorption | 0.011 m^2/kg | 0.02 m^2/kg

| hydrogen | hafnium CAS number | 1333-74-0 | 7440-58-6 PubChem CID number | 783 | 23986