tantalum vs vanadium

tantalum (chemical element) | vanadium (chemical element)

Periodic table location

Images

| tantalum | vanadium atomic symbol | Ta | V atomic number | 73 | 23 short electronic configuration | [Xe]6s^24f^145d^3 | [Ar]4s^23d^3 Aufbau diagram | 5d 4f 6s | 3d 4s block | d | d group | 5 | 5 period | 6 | 4 atomic mass | 180.94788 u | 50.9415 u half-life | (stable) | (stable)

| tantalum | vanadium phase at STP | solid | solid melting point | 3017 °C | 1910 °C boiling point | 5458 °C | 3407 °C molar heat of fusion | 36 kJ/mol | 22.8 kJ/mol molar heat of vaporization | 735 kJ/mol | 453 kJ/mol specific heat at STP | 140 J/(kg K) | 489 J/(kg K) (properties at standard conditions)

| tantalum | vanadium density | 16.65 g/cm^3 | 6.11 g/cm^3 liquid density | 15 g/cm^3 | 5.5 g/cm^3 molar volume | 10.868 cm^3/mol | 8.337 cm^3/mol Mohs hardness | 6.5 (between microcline and quartz) | 7 (≈ quartz) Vickers hardness | 873 MPa | 628 MPa Brinell hardness | 800 MPa | 628 MPa bulk modulus | 200 GPa | 160 GPa shear modulus | 69 GPa | 47 GPa Young's modulus | 186 GPa | 128 GPa Poisson ratio | 0.34 | 0.37 sound speed | 3400 m/s | 4560 m/s thermal expansion | 6.3×10^-6 K^(-1) | 8.4×10^-6 K^(-1) thermal conductivity | 57 W/(m K) | 31 W/(m K) (properties at standard conditions)

| tantalum | vanadium electrical type | conductor | conductor resistivity | 1.3×10^-7 Ω m (ohm meters) | 2×10^-7 Ω m (ohm meters) electrical conductivity | 7.7×10^6 S/m (siemens per meter) | 5×10^6 S/m (siemens per meter) magnetic type | paramagnetic | paramagnetic volume magnetic susceptibility | 1.782×10^-4 | 3.837×10^-4 mass magnetic susceptibility | 1.07×10^-8 m^3/kg (cubic meters per kilogram) | 6.28×10^-8 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | 1.936×10^-9 m^3/mol (cubic meters per mole) | 3.199×10^-9 m^3/mol (cubic meters per mole) work function | (4 to 4.8) eV | 4.3 eV (Polycrystalline) threshold frequency | (9.672×10^14 to 1.161×10^15) Hz (hertz) | 1.04×10^15 Hz (hertz) superconducting point | 4.47 K (kelvins) | 5.4 K (kelvins) color | (gray) | (silver)

| tantalum | vanadium valence | 5 | 5 electronegativity | 1.5 | 1.63 electron affinity | 31 kJ/mol (kilojoules per mole) | 50.6 kJ/mol (kilojoules per mole) first ionization energy | 761 kJ/mol (kilojoules per mole) | 650.9 kJ/mol (kilojoules per mole) ionization energies | 761 kJ/mol | 1500 kJ/mol | 650.9 kJ/mol | 1414 kJ/mol | 2830 kJ/mol | 4507 kJ/mol | 6298.7 kJ/mol | 12363 kJ/mol | 14530 kJ/mol | 16730 kJ/mol | 19860 kJ/mol | 22240 kJ/mol | 24670 kJ/mol | 29730 kJ/mol | 32446 kJ/mol | 86450 kJ/mol | 94170 kJ/mol | 102300 kJ/mol | 112700 kJ/mol | 121600 kJ/mol | 130700 kJ/mol | 143400 kJ/mol | 151440 kJ/mol

Reactivity

| tantalum | vanadium term symbol | ^4F_(3/2) | ^4F_(3/2) atomic radius | 145 pm | 135 pm covalent radius | 170 pm | 153 pm (electronic ground state properties)

| tantalum | vanadium universe abundance | 8×10^-9 mass% | 1×10^-4 mass% solar abundance | | 4×10^-5 mass% meteorite abundance | 2×10^-6 mass% | 0.0061 mass% crust abundance | 1.7×10^-4 mass% | 0.019 mass% ocean abundance | 2×10^-10 mass% | 1.5×10^-7 mass% human abundance | | 3×10^-6 mass% universe molar abundance | 6×10^-11 mol% | 2×10^-6 mol% solar molar abundance | | 9×10^-7 mol% meteorite molar abundance | 2×10^-7 mol% | 0.0023 mol% ocean molar abundance | 6.8×10^-12 mol% | 1.8×10^-8 mol% crust molar abundance | 1.9×10^-5 mol% | 0.0075 mol% human molar abundance | | 4×10^-7 mol%

| tantalum | vanadium half-life | (stable) | (stable) stable isotopes | Ta-181 (99.988%) | V-51 (99.75%) nuclear spin | Ta-155: 11/2^- | Ta-156: 2^- | Ta-157: 1/2^+ | Ta-158: 2^- | Ta-159: 1/2^- | Ta-160: 2^- | Ta-161: 1/2^+ | Ta-162: 3^+ | Ta-163: 1/2^+ | Ta-164: 3^+ | Ta-165: 5/2^- | Ta-166: 2^+ | Ta-167: 3/2^+ | Ta-169: 5/2^+ | Ta-170: 3^+ | Ta-171: 5/2^- | Ta-172: 3^+ | Ta-173: 5/2^- | Ta-174: 3^+ | Ta-175: 7/2^+ | Ta-176: 1^- | Ta-177: 7/2^+ | Ta-178: 7^- | Ta-179: 7/2^+ | Ta-180: 1^+ | Ta-181: 7/2^+ | Ta-182: 3^- | Ta-183: 7/2^+ | Ta-184: 5^- | Ta-185: 7/2^+ | Ta-187: 7/2^+ | Ta-189: 7/2^+ | V-40: 2^- | V-41: 7/2^- | V-42: 2^- | V-43: 7/2^- | V-44: 2^+ | V-45: 7/2^- | V-46: 0^+ | V-47: 3/2^- | V-48: 4^+ | V-49: 7/2^- | V-50: 6^+ | V-51: 7/2^- | V-52: 3^+ | V-53: 7/2^- | V-54: 3^+ | V-55: 7/2^- | V-56: 1^+ | V-57: 3/2^- | V-58: 1^+ | V-60: 3^+ | V-61: 3/2^- | V-62: 3^+ | V-63: 7/2^- | V-65: 5/2^- unstable isotopes | Ta-179 (1.82 yr) | Ta-182 (114.43 days) | Ta-183 (120 h) | Ta-177 (56.56 h) | Ta-175 (10.5 h) | Ta-184 (8.6 h) | Ta-180 (8.1528 h) | Ta-176 (8.08 h) | Ta-173 (188 min) | Ta-178 (142 min) | Ta-174 (68 min) | Ta-185 (49.33 min) | Ta-172 (36.83 min) | Ta-171 (23 min) | Ta-186 (10.5 min) | Ta-170 (6.77 min) | Ta-169 (4.83 min) | Ta-187 (120 s) | Ta-168 (120 s) | Ta-167 (79.8 s) | Ta-166 (34.4 s) | Ta-165 (31 s) | Ta-188 (20 s) | Ta-164 (14.2 s) | Ta-163 (10.6 s) | Ta-162 (3.57 s) | Ta-189 (3 s) | Ta-161 (3 s) | Ta-160 (1.55 s) | Ta-159 (830 ms) | Ta-190 (300 ms) | Ta-156 (144 ms) | Ta-158 (55 ms) | Ta-157 (10.1 ms) | Ta-155 (13 µs) | V-50 (140 quadrillion yr) | V-49 (330 days) | V-48 (15.9735 days) | V-47 (32.67 min) | V-52 (224.6 s) | V-53 (96 s) | V-54 (49.8 s) | V-55 (6.54 s) | V-43 (800 ms) | V-45 (547 ms) | V-46 (422.5 ms) | V-57 (350 ms) | V-56 (216 ms) | V-58 (185 ms) | V-44 (111 ms) | V-59 (75 ms) | V-60 (68 ms) | V-61 (47 ms) | V-64 (19 ms) | V-63 (17 ms) | V-65 (10 ms) | V-62 (150 ns) | V-42 (55 ns) neutron cross-section | 20.5 b | 5.06 b neutron mass absorption | 0.0041 m^2/kg | 0.0033 m^2/kg

| tantalum | vanadium CAS number | 7440-25-7 | 7440-62-2 PubChem CID number | 23956 | 23990