barium vs lanthanum

barium (chemical element) | lanthanum (chemical element)

Periodic table location

Images

| barium | lanthanum atomic symbol | Ba | La atomic number | 56 | 57 short electronic configuration | [Xe]6s^2 | [Xe]6s^25d^1 Aufbau diagram | 6s | 5d 6s block | s | f group | 2 | period | 6 | 6 atomic mass | 137.327 u | 138.90547 u half-life | (stable) | (stable)

| barium | lanthanum phase at STP | solid | solid melting point | 727 °C | 920 °C boiling point | 1870 °C | 3464 °C molar heat of fusion | 8 kJ/mol | 6.2 kJ/mol molar heat of vaporization | 140 kJ/mol | 400 kJ/mol specific heat at STP | 205 J/(kg K) | 195 J/(kg K) (properties at standard conditions)

| barium | lanthanum density | 3.51 g/cm^3 | 6.146 g/cm^3 liquid density | 3.338 g/cm^3 | 5.94 g/cm^3 molar volume | 39.12 cm^3/mol | 22.6 cm^3/mol Mohs hardness | 1.25 (between talc and gypsum) | 2.5 (between gypsum and calcite) Vickers hardness | (unknown) | 491 MPa Brinell hardness | | 363 MPa bulk modulus | 9.6 GPa | 28 GPa shear modulus | 4.9 GPa | 14 GPa Young's modulus | 13 GPa | 37 GPa Poisson ratio | | 0.28 tensile yield strength | | 125 MPa ultimate tensile strength | | 130 MPa sound speed | 1620 m/s | 2475 m/s thermal expansion | 2.06×10^-5 K^(-1) | 1.21×10^-5 K^(-1) thermal conductivity | 18 W/(m K) | 13 W/(m K) (properties at standard conditions)

| barium | lanthanum electrical type | conductor | conductor resistivity | 3.5×10^-7 Ω m (ohm meters) | 6.1×10^-7 Ω m (ohm meters) electrical conductivity | 2.9×10^6 S/m (siemens per meter) | 1.6×10^6 S/m (siemens per meter) magnetic type | paramagnetic | paramagnetic volume magnetic susceptibility | 3.966×10^-5 | 6.761×10^-5 mass magnetic susceptibility | 1.13×10^-8 m^3/kg (cubic meters per kilogram) | 1.1×10^-8 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | 1.552×10^-9 m^3/mol (cubic meters per mole) | 1.528×10^-9 m^3/mol (cubic meters per mole) work function | 2.52 eV (Polycrystalline) | 3.5 eV (Polycrystalline) threshold frequency | 6.093×10^14 Hz (hertz) | 8.463×10^14 Hz (hertz) superconducting point | (unknown) | 4.88 K (kelvins) color | (silver) | (silver)

| barium | lanthanum valence | 2 | 3 electronegativity | 0.89 | 1.1 electron affinity | 13.95 kJ/mol (kilojoules per mole) | 48 kJ/mol (kilojoules per mole) first ionization energy | 502.9 kJ/mol (kilojoules per mole) | 538.1 kJ/mol (kilojoules per mole) ionization energies | 502.9 kJ/mol | 965.2 kJ/mol | 3600 kJ/mol | 538.1 kJ/mol | 1067 kJ/mol | 1850.3 kJ/mol | 4819 kJ/mol | 5940 kJ/mol

Reactivity

| barium | lanthanum term symbol | ^1S_0 | ^2D_(3/2) atomic radius | 215 pm | 195 pm covalent radius | 215 pm | 207 pm (electronic ground state properties)

| barium | lanthanum universe abundance | 1×10^-6 mass% | 2×10^-7 mass% solar abundance | 1×10^-6 mass% | 2×10^-7 mass% meteorite abundance | 2.7×10^-4 mass% | 2.8×10^-5 mass% crust abundance | 0.034 mass% | 0.0034 mass% ocean abundance | 3×10^-6 mass% | 3.4×10^-10 mass% human abundance | 3×10^-5 mass% | universe molar abundance | 9×10^-9 mol% | 2×10^-9 mol% solar molar abundance | 9.9×10^-9 mol% | 9.9×10^-10 mol% meteorite molar abundance | 4.1×10^-5 mol% | 4×10^-6 mol% ocean molar abundance | 1.4×10^-7 mol% | 1.5×10^-11 mol% crust molar abundance | 0.0051 mol% | 5×10^-4 mol% human molar abundance | 1.4×10^-6 mol% |

| barium | lanthanum half-life | (stable) | (stable) stable isotopes | Ba-138 (71.698%) | Ba-137 (11.232%) | Ba-136 (7.854%) | Ba-135 (6.592%) | Ba-134 (2.417%) | Ba-130 (0.106%) | Ba-132 (0.101%) | La-139 (99.91%) nuclear spin | Ba-114: 0^+ | Ba-115: 5/2^+ | Ba-116: 0^+ | Ba-117: 3/2^+ | Ba-118: 0^+ | Ba-119: 5/2^+ | Ba-120: 0^+ | Ba-121: 5/2^+ | Ba-122: 0^+ | Ba-123: 5/2^+ | Ba-124: 0^+ | Ba-125: 1/2^+ | Ba-126: 0^+ | Ba-127: 1/2^+ | Ba-128: 0^+ | Ba-129: 1/2^+ | Ba-130: 0^+ | Ba-131: 1/2^+ | Ba-132: 0^+ | Ba-133: 1/2^+ | Ba-134: 0^+ | Ba-135: 3/2^+ | Ba-136: 0^+ | Ba-137: 3/2^+ | Ba-138: 0^+ | Ba-139: 7/2^- | Ba-140: 0^+ | Ba-141: 3/2^- | Ba-142: 0^+ | Ba-143: 5/2^- | Ba-144: 0^+ | Ba-145: 5/2^- | Ba-146: 0^+ | Ba-147: 3/2^+ | Ba-148: 0^+ | Ba-149: 3/2^- | Ba-150: 0^+ | Ba-151: 3/2^- | Ba-152: 0^+ | Ba-153: 5/2^- | La-119: 11/2^- | La-121: 11/2^- | La-123: 11/2^- | La-125: 11/2^- | La-126: 5^+ | La-127: 11/2^- | La-128: 5^+ | La-129: 3/2^+ | La-130: 3^+ | La-131: 3/2^+ | La-132: 2^- | La-133: 5/2^+ | La-134: 1^+ | La-135: 5/2^+ | La-136: 1^+ | La-137: 7/2^+ | La-138: 5^+ | La-139: 7/2^+ | La-140: 3^- | La-141: 7/2^+ | La-142: 2^- | La-143: 7/2^+ | La-144: 3^- | La-145: 5/2^+ | La-146: 2^- | La-147: 5/2^+ | La-148: 2^- | La-149: 3/2^- | La-150: 3^- | La-151: 5/2^+ | La-153: 5/2^+ | La-155: 5/2^+ unstable isotopes | Ba-133 (10.52 yr) | Ba-140 (12.752 days) | Ba-131 (11.5 days) | Ba-128 (58 h) | Ba-129 (133.8 min) | Ba-126 (100 min) | Ba-139 (83.06 min) | Ba-141 (18.27 min) | Ba-127 (12.7 min) | Ba-124 (11 min) | Ba-142 (10.6 min) | Ba-125 (210 s) | Ba-123 (160 s) | Ba-122 (117 s) | Ba-121 (29.7 s) | Ba-120 (24 s) | Ba-143 (14.5 s) | Ba-144 (11.5 s) | Ba-119 (5.4 s) | Ba-118 (5.5 s) | Ba-145 (4.31 s) | Ba-146 (2.22 s) | Ba-117 (1.75 s) | Ba-116 (1.3 s) | Ba-147 (893 ms) | Ba-148 (612 ms) | Ba-115 (450 ms) | Ba-114 (430 ms) | Ba-149 (344 ms) | Ba-150 (300 ms) | Ba-152 (100 ms) | Ba-153 (80 ms) | Ba-151 (300 ns) | La-138 (102 billion yr) | La-137 (60000 yr) | La-140 (40.2852 h) | La-135 (19.5 h) | La-132 (4.7 h) | La-141 (3.92 h) | La-133 (3.9111 h) | La-142 (91.17 min) | La-131 (58 min) | La-143 (14.2 min) | La-129 (11.6 min) | La-136 (9.87 min) | La-130 (8.67 min) | La-134 (6.45 min) | La-128 (5.18 min) | La-127 (5.17 min) | La-125 (64.8 s) | La-126 (54 s) | La-144 (40.8 s) | La-124 (29.21 s) | La-145 (24.8 s) | La-123 (17 s) | La-122 (8.7 s) | La-146 (6.27 s) | La-121 (5.3 s) | La-147 (4.015 s) | La-120 (2.8 s) | La-119 (2 s) | La-148 (1.26 s) | La-149 (1.05 s) | La-118 (1 s) | La-150 (510 ms) | La-154 (100 ms) | La-155 (60 ms) | La-117 (23.5 ms) | La-151 (300 ns) | La-152 (150 ns) | La-153 (100 ns) neutron cross-section | 1.3 b | 8.98 b neutron mass absorption | 2.7×10^-4 m^2/kg | 0.0023 m^2/kg

| barium | lanthanum CAS number | 7440-39-3 | 7439-91-0 PubChem CID number | 5355457 | 23926