barium vs calcium

barium (chemical element) | calcium (chemical element)

Periodic table location

Images

| barium | calcium atomic symbol | Ba | Ca atomic number | 56 | 20 short electronic configuration | [Xe]6s^2 | [Ar]4s^2 Aufbau diagram | 6s | 4s block | s | s group | 2 | 2 period | 6 | 4 atomic mass | 137.327 u | 40.078 u half-life | (stable) | (stable)

| barium | calcium phase at STP | solid | solid melting point | 727 °C | 842 °C boiling point | 1870 °C | 1484 °C molar heat of fusion | 8 kJ/mol | 8.54 kJ/mol molar heat of vaporization | 140 kJ/mol | 155 kJ/mol specific heat at STP | 205 J/(kg K) | 631 J/(kg K) (properties at standard conditions)

| barium | calcium density | 3.51 g/cm^3 | 1.55 g/cm^3 liquid density | 3.338 g/cm^3 | 1.378 g/cm^3 molar volume | 39.12 cm^3/mol | 25.86 cm^3/mol Mohs hardness | 1.25 (between talc and gypsum) | 1.75 (between gypsum and talc) Brinell hardness | | 167 MPa bulk modulus | 9.6 GPa | 17 GPa shear modulus | 4.9 GPa | 7.4 GPa Young's modulus | 13 GPa | 20 GPa Poisson ratio | | 0.31 sound speed | 1620 m/s | 3810 m/s thermal expansion | 2.06×10^-5 K^(-1) | 2.23×10^-5 K^(-1) thermal conductivity | 18 W/(m K) | 200 W/(m K) (properties at standard conditions)

| barium | calcium electrical type | conductor | conductor resistivity | 3.5×10^-7 Ω m (ohm meters) | 3.4×10^-8 Ω m (ohm meters) electrical conductivity | 2.9×10^6 S/m (siemens per meter) | 2.9×10^7 S/m (siemens per meter) magnetic type | paramagnetic | paramagnetic volume magnetic susceptibility | 3.966×10^-5 | 2.139×10^-5 mass magnetic susceptibility | 1.13×10^-8 m^3/kg (cubic meters per kilogram) | 1.38×10^-8 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | 1.552×10^-9 m^3/mol (cubic meters per mole) | 5.531×10^-10 m^3/mol (cubic meters per mole) work function | 2.52 eV (Polycrystalline) | 2.87 eV (Polycrystalline) threshold frequency | 6.093×10^14 Hz (hertz) | 6.94×10^14 Hz (hertz) color | (silver) | (silver)

| barium | calcium valence | 2 | 2 electronegativity | 0.89 | 1 electron affinity | 13.95 kJ/mol (kilojoules per mole) | 2.37 kJ/mol (kilojoules per mole) first ionization energy | 502.9 kJ/mol (kilojoules per mole) | 589.8 kJ/mol (kilojoules per mole) ionization energies | 502.9 kJ/mol | 965.2 kJ/mol | 3600 kJ/mol | 589.8 kJ/mol | 1145.4 kJ/mol | 4912.4 kJ/mol | 6491 kJ/mol | 8153 kJ/mol | 10496 kJ/mol | 12270 kJ/mol | 14206 kJ/mol | 18191 kJ/mol | 20385 kJ/mol | 57110 kJ/mol

Reactivity

| barium | calcium term symbol | ^1S_0 | ^1S_0 atomic radius | 215 pm | 180 pm covalent radius | 215 pm | 176 pm (electronic ground state properties)

| barium | calcium universe abundance | 1×10^-6 mass% | 0.007 mass% solar abundance | 1×10^-6 mass% | 0.007 mass% meteorite abundance | 2.7×10^-4 mass% | 1.1 mass% crust abundance | 0.034 mass% | 5 mass% ocean abundance | 3×10^-6 mass% | 4.2×10^-4 mass% human abundance | 3×10^-5 mass% | 1.4 mass% universe molar abundance | 9×10^-9 mol% | 2×10^-4 mol% solar molar abundance | 9.9×10^-9 mol% | 2×10^-4 mol% meteorite molar abundance | 4.1×10^-5 mol% | 0.52 mol% ocean molar abundance | 1.4×10^-7 mol% | 6.5×10^-5 mol% crust molar abundance | 0.0051 mol% | 2.6 mol% human molar abundance | 1.4×10^-6 mol% | 0.22 mol%

| barium | calcium 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%) | Ca-40 (96.94%) | Ca-44 (2.09%) | Ca-42 (0.647%) | Ca-43 (0.135%) | Ca-46 (4×10^-5) 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^- | Ca-34: 0^+ | Ca-35: 1/2^+ | Ca-36: 0^+ | Ca-37: 3/2^+ | Ca-38: 0^+ | Ca-39: 3/2^+ | Ca-40: 0^+ | Ca-41: 7/2^- | Ca-42: 0^+ | Ca-43: 7/2^- | Ca-44: 0^+ | Ca-45: 7/2^- | Ca-46: 0^+ | Ca-47: 7/2^- | Ca-48: 0^+ | Ca-49: 3/2^- | Ca-50: 0^+ | Ca-51: 3/2^- | Ca-52: 0^+ | Ca-54: 0^+ | Ca-55: 5/2^- | Ca-56: 0^+ | Ca-57: 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) | Ca-48 (1.9×10^19 yr) | Ca-41 (0.102 Myr) | Ca-45 (162.61 days) | Ca-47 (108.9 h) | Ca-49 (8.718 min) | Ca-50 (13.9 s) | Ca-51 (10 s) | Ca-52 (4.6 s) | Ca-39 (859.6 ms) | Ca-38 (440 ms) | Ca-37 (181.1 ms) | Ca-36 (102 ms) | Ca-53 (90 ms) | Ca-55 (30 ms) | Ca-35 (25.7 ms) | Ca-56 (10 ms) | Ca-57 (5 ms) | Ca-54 (300 ns) | Ca-34 (35 ns) neutron cross-section | 1.3 b | 0.43 b neutron mass absorption | 2.7×10^-4 m^2/kg | 3.7×10^-4 m^2/kg

| barium | calcium CAS number | 7440-39-3 | 7440-70-2 PubChem CID number | 5355457 | 5460341