barium vs beryllium vs strontium

barium (chemical element) | beryllium (chemical element) | strontium (chemical element)

Periodic table location

Images

| barium | beryllium | strontium atomic symbol | Ba | Be | Sr atomic number | 56 | 4 | 38 short electronic configuration | [Xe]6s^2 | [He]2s^2 | [Kr]5s^2 Aufbau diagram | 6s | 2s | 5s block | s | s | s group | 2 | 2 | 2 period | 6 | 2 | 5 atomic mass | 137.327 u | 9.0121831 u | 87.62 u half-life | (stable) | (stable) | (stable)

| barium | beryllium | strontium phase at STP | solid | solid | solid melting point | 727 °C | 1287 °C | 777 °C boiling point | 1870 °C | 2470 °C | 1382 °C molar heat of fusion | 8 kJ/mol | 7.95 kJ/mol | 8 kJ/mol molar heat of vaporization | 140 kJ/mol | 297 kJ/mol | 137 kJ/mol specific heat at STP | 205 J/(kg K) | 1820 J/(kg K) | 300 J/(kg K) (properties at standard conditions)

| barium | beryllium | strontium density | 3.51 g/cm^3 | 1.848 g/cm^3 | 2.63 g/cm^3 liquid density | 3.338 g/cm^3 | 1.69 g/cm^3 | 2.375 g/cm^3 molar volume | 39.12 cm^3/mol | 4.877 cm^3/mol | 33.32 cm^3/mol Mohs hardness | 1.25 (between talc and gypsum) | 5.5 (between apatite and microcline) | 1.5 (between talc and gypsum) Vickers hardness | (unknown) | 1670 MPa | Brinell hardness | | 600 MPa | bulk modulus | 9.6 GPa | 130 GPa | shear modulus | 4.9 GPa | 132 GPa | 6.1 GPa Young's modulus | 13 GPa | 287 GPa | Poisson ratio | | 0.032 | 0.28 tensile yield strength | | 240 MPa | ultimate tensile strength | | 370 MPa | sound speed | 1620 m/s | 13000 m/s | thermal expansion | 2.06×10^-5 K^(-1) | 1.13×10^-5 K^(-1) | 2.25×10^-5 K^(-1) thermal conductivity | 18 W/(m K) | 190 W/(m K) | 35 W/(m K) (properties at standard conditions)

| barium | beryllium | strontium electrical type | conductor | conductor | conductor resistivity | 3.5×10^-7 Ω m (ohm meters) | 4×10^-8 Ω m (ohm meters) | 1.3×10^-7 Ω m (ohm meters) electrical conductivity | 2.9×10^6 S/m (siemens per meter) | 2.5×10^7 S/m (siemens per meter) | 7.7×10^6 S/m (siemens per meter) magnetic type | paramagnetic | diamagnetic | paramagnetic volume magnetic susceptibility | 3.966×10^-5 | -2.328×10^-5 | 3.47×10^-6 mass magnetic susceptibility | 1.13×10^-8 m^3/kg (cubic meters per kilogram) | -1.26×10^-8 m^3/kg (cubic meters per kilogram) | 1.32×10^-9 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | 1.552×10^-9 m^3/mol (cubic meters per mole) | -1.136×10^-10 m^3/mol (cubic meters per mole) | 1.16×10^-10 m^3/mol (cubic meters per mole) work function | 2.52 eV (Polycrystalline) | 4.98 eV (Polycrystalline) | 2.59 eV (Polycrystalline) threshold frequency | 6.093×10^14 Hz (hertz) | 1.204×10^15 Hz (hertz) | 6.263×10^14 Hz (hertz) superconducting point | (unknown) | 0.026 K (kelvins) | color | (silver) | (slate gray) | (silver)

| barium | beryllium | strontium valence | 2 | 2 | 2 electronegativity | 0.89 | 1.57 | 0.95 electron affinity | 13.95 kJ/mol (kilojoules per mole) | 0 kJ/mol (kilojoules per mole) | 5.03 kJ/mol (kilojoules per mole) first ionization energy | 502.9 kJ/mol (kilojoules per mole) | 899.5 kJ/mol (kilojoules per mole) | 549.5 kJ/mol (kilojoules per mole) ionization energies | 502.9 kJ/mol | 965.2 kJ/mol | 3600 kJ/mol | 899.5 kJ/mol | 1757.1 kJ/mol | 14848.7 kJ/mol | 21006.6 kJ/mol | 549.5 kJ/mol | 1064.2 kJ/mol | 4138 kJ/mol | 5500 kJ/mol | 6910 kJ/mol | 8760 kJ/mol | 10230 kJ/mol | 11800 kJ/mol | 15600 kJ/mol | 17100 kJ/mol

Reactivity

| barium | beryllium | strontium term symbol | ^1S_0 | ^1S_0 | ^1S_0 atomic radius | 215 pm | 105 pm | 200 pm covalent radius | 215 pm | 96 pm | 195 pm (electronic ground state properties)

| barium | beryllium | strontium universe abundance | 1×10^-6 mass% | 1×10^-7 mass% | 4×10^-6 mass% solar abundance | 1×10^-6 mass% | 1×10^-8 mass% | 5×10^-6 mass% meteorite abundance | 2.7×10^-4 mass% | 2.9×10^-6 mass% | 8.7×10^-4 mass% crust abundance | 0.034 mass% | 1.9×10^-4 mass% | 0.036 mass% ocean abundance | 3×10^-6 mass% | 6×10^-11 mass% | 8.1×10^-4 mass% human abundance | 3×10^-5 mass% | 4×10^-8 mass% | 4.6×10^-4 mass% universe molar abundance | 9×10^-9 mol% | 1×10^-8 mol% | 6×10^-8 mol% solar molar abundance | 9.9×10^-9 mol% | 9.9×10^-10 mol% | 7×10^-8 mol% meteorite molar abundance | 4.1×10^-5 mol% | 7×10^-6 mol% | 2×10^-4 mol% ocean molar abundance | 1.4×10^-7 mol% | 4.1×10^-11 mol% | 5.7×10^-5 mol% crust molar abundance | 0.0051 mol% | 4.3×10^-4 mol% | 0.0085 mol% human molar abundance | 1.4×10^-6 mol% | 3×10^-8 mol% | 3.3×10^-5 mol%

| barium | beryllium | strontium half-life | (stable) | (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%) | Be-9 (100%) | Sr-88 (82.58%) | Sr-86 (9.86%) | Sr-87 (7%) | Sr-84 (0.56%) 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^- | Be-5: 1/2^+ | Be-6: 0^+ | Be-7: 3/2^- | Be-8: 0^+ | Be-9: 3/2^- | Be-10: 0^+ | Be-11: 1/2^+ | Be-12: 0^+ | Be-13: 1/2^- | Be-14: 0^+ | Be-16: 0^+ | Sr-73: 1/2^- | Sr-74: 0^+ | Sr-75: 3/2^- | Sr-76: 0^+ | Sr-77: 5/2^+ | Sr-78: 0^+ | Sr-79: 3/2^- | Sr-80: 0^+ | Sr-81: 1/2^- | Sr-82: 0^+ | Sr-83: 7/2^+ | Sr-84: 0^+ | Sr-85: 9/2^+ | Sr-86: 0^+ | Sr-87: 9/2^+ | Sr-88: 0^+ | Sr-89: 5/2^+ | Sr-90: 0^+ | Sr-91: 5/2^+ | Sr-92: 0^+ | Sr-93: 5/2^+ | Sr-94: 0^+ | Sr-95: 1/2^+ | Sr-96: 0^+ | Sr-97: 1/2^+ | Sr-98: 0^+ | Sr-99: 3/2^+ | Sr-100: 0^+ | Sr-101: 5/2^- | Sr-102: 0^+ | Sr-104: 0^+ 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) | Be-10 (1.51 Myr) | Be-7 (53.22 days) | Be-11 (13.81 s) | Be-12 (21.5 ms) | Be-14 (4.35 ms) | Be-16 (200 ns) | Be-15 (200 ns) | Be-8 (81.9 as) | Be-6 (5 zs) | Be-13 (2.7 zs) | Sr-90 (28.9 yr) | Sr-85 (64.853 days) | Sr-89 (50.53 days) | Sr-82 (25.55 days) | Sr-83 (32.42 h) | Sr-91 (9.64 h) | Sr-92 (159.7 min) | Sr-80 (106.3 min) | Sr-81 (22.33 min) | Sr-93 (7.423 min) | Sr-78 (150 s) | Sr-79 (135 s) | Sr-94 (75.3 s) | Sr-95 (23.9 s) | Sr-77 (9 s) | Sr-76 (7.89 s) | Sr-96 (1.07 s) | Sr-98 (653 ms) | Sr-97 (429 ms) | Sr-99 (269 ms) | Sr-100 (202 ms) | Sr-101 (118 ms) | Sr-75 (88 ms) | Sr-102 (69 ms) | Sr-104 (30 ms) | Sr-73 (25 ms) | Sr-105 (20 ms) | Sr-74 (1.2 µs) | Sr-103 (150 ns) neutron cross-section | 1.3 b | 0.0092 b | 1.2 b neutron mass absorption | 2.7×10^-4 m^2/kg | 3×10^-5 m^2/kg | 5×10^-4 m^2/kg

| barium | beryllium | strontium CAS number | 7440-39-3 | 7440-41-7 | 7440-24-6 PubChem CID number | 5355457 | 5460467 | 5359327