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cesium vs helium vs barium

Input interpretation

cesium (chemical element) | helium (chemical element) | barium (chemical element)
cesium (chemical element) | helium (chemical element) | barium (chemical element)

Periodic table location

Periodic table location
Periodic table location

Images

Images
Images

Basic elemental properties

| cesium | helium | barium atomic symbol | Cs | He | Ba atomic number | 55 | 2 | 56 short electronic configuration | [Xe]6s^1 | 1s^2 | [Xe]6s^2 Aufbau diagram | 6s | 1s | 6s block | s | s | s group | 1 | 18 | 2 period | 6 | 1 | 6 atomic mass | 132.90545196 u | 4.002602 u | 137.327 u half-life | (stable) | (stable) | (stable)
| cesium | helium | barium atomic symbol | Cs | He | Ba atomic number | 55 | 2 | 56 short electronic configuration | [Xe]6s^1 | 1s^2 | [Xe]6s^2 Aufbau diagram | 6s | 1s | 6s block | s | s | s group | 1 | 18 | 2 period | 6 | 1 | 6 atomic mass | 132.90545196 u | 4.002602 u | 137.327 u half-life | (stable) | (stable) | (stable)

Thermodynamic properties

| cesium | helium | barium phase at STP | solid | gas | solid melting point | 28.44 °C | | 727 °C boiling point | 671 °C | -268.93 °C | 1870 °C critical temperature | 1938 K | 5.19 K | (unknown) critical pressure | 9.4 MPa | 0.227 MPa | (unknown) molar heat of fusion | 2.09 kJ/mol | 0.02 kJ/mol | 8 kJ/mol molar heat of vaporization | 65 kJ/mol | 0.083 kJ/mol | 140 kJ/mol specific heat at STP | 242 J/(kg K) | 5193.1 J/(kg K) | 205 J/(kg K) adiabatic index | | 5/3 | (properties at standard conditions)
| cesium | helium | barium phase at STP | solid | gas | solid melting point | 28.44 °C | | 727 °C boiling point | 671 °C | -268.93 °C | 1870 °C critical temperature | 1938 K | 5.19 K | (unknown) critical pressure | 9.4 MPa | 0.227 MPa | (unknown) molar heat of fusion | 2.09 kJ/mol | 0.02 kJ/mol | 8 kJ/mol molar heat of vaporization | 65 kJ/mol | 0.083 kJ/mol | 140 kJ/mol specific heat at STP | 242 J/(kg K) | 5193.1 J/(kg K) | 205 J/(kg K) adiabatic index | | 5/3 | (properties at standard conditions)

Material properties

| cesium | helium | barium density | 1.879 g/cm^3 | 1.785×10^-4 g/cm^3 | 3.51 g/cm^3 liquid density | 1.843 g/cm^3 | | 3.338 g/cm^3 molar volume | 70.73 cm^3/mol | 22420 cm^3/mol | 39.12 cm^3/mol Mohs hardness | 0.2 (between talc and gypsum) | | 1.25 (between talc and gypsum) Brinell hardness | 0.14 MPa | | bulk modulus | 1.6 GPa | | 9.6 GPa shear modulus | | | 4.9 GPa Young's modulus | 1.7 GPa | | 13 GPa refractive index | | 1.000035 | (unknown) sound speed | | 970 m/s | 1620 m/s thermal expansion | | | 2.06×10^-5 K^(-1) thermal conductivity | 36 W/(m K) | 0.1513 W/(m K) | 18 W/(m K) (properties at standard conditions)
| cesium | helium | barium density | 1.879 g/cm^3 | 1.785×10^-4 g/cm^3 | 3.51 g/cm^3 liquid density | 1.843 g/cm^3 | | 3.338 g/cm^3 molar volume | 70.73 cm^3/mol | 22420 cm^3/mol | 39.12 cm^3/mol Mohs hardness | 0.2 (between talc and gypsum) | | 1.25 (between talc and gypsum) Brinell hardness | 0.14 MPa | | bulk modulus | 1.6 GPa | | 9.6 GPa shear modulus | | | 4.9 GPa Young's modulus | 1.7 GPa | | 13 GPa refractive index | | 1.000035 | (unknown) sound speed | | 970 m/s | 1620 m/s thermal expansion | | | 2.06×10^-5 K^(-1) thermal conductivity | 36 W/(m K) | 0.1513 W/(m K) | 18 W/(m K) (properties at standard conditions)

Electromagnetic properties

| cesium | helium | barium electrical type | conductor | | conductor resistivity | 2×10^-7 Ω m (ohm meters) | | 3.5×10^-7 Ω m (ohm meters) electrical conductivity | 5×10^6 S/m (siemens per meter) | | 2.9×10^6 S/m (siemens per meter) magnetic type | paramagnetic | diamagnetic | paramagnetic volume magnetic susceptibility | 5.26×10^-6 | -1.05×10^-9 | 3.966×10^-5 mass magnetic susceptibility | 2.8×10^-9 m^3/kg (cubic meters per kilogram) | -5.9×10^-9 m^3/kg (cubic meters per kilogram) | 1.13×10^-8 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | 3.72×10^-10 m^3/mol (cubic meters per mole) | -2.36×10^-11 m^3/mol (cubic meters per mole) | 1.552×10^-9 m^3/mol (cubic meters per mole) work function | 1.95 eV (Polycrystalline) | | 2.52 eV (Polycrystalline) threshold frequency | 4.715×10^14 Hz (hertz) | | 6.093×10^14 Hz (hertz) color | (yellow) | (colorless) | (silver) refractive index | | 1.000035 | (unknown)
| cesium | helium | barium electrical type | conductor | | conductor resistivity | 2×10^-7 Ω m (ohm meters) | | 3.5×10^-7 Ω m (ohm meters) electrical conductivity | 5×10^6 S/m (siemens per meter) | | 2.9×10^6 S/m (siemens per meter) magnetic type | paramagnetic | diamagnetic | paramagnetic volume magnetic susceptibility | 5.26×10^-6 | -1.05×10^-9 | 3.966×10^-5 mass magnetic susceptibility | 2.8×10^-9 m^3/kg (cubic meters per kilogram) | -5.9×10^-9 m^3/kg (cubic meters per kilogram) | 1.13×10^-8 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | 3.72×10^-10 m^3/mol (cubic meters per mole) | -2.36×10^-11 m^3/mol (cubic meters per mole) | 1.552×10^-9 m^3/mol (cubic meters per mole) work function | 1.95 eV (Polycrystalline) | | 2.52 eV (Polycrystalline) threshold frequency | 4.715×10^14 Hz (hertz) | | 6.093×10^14 Hz (hertz) color | (yellow) | (colorless) | (silver) refractive index | | 1.000035 | (unknown)

Reactivity

| cesium | helium | barium valence | 1 | 0 | 2 electronegativity | 0.79 | | 0.89 electron affinity | 45.5 kJ/mol (kilojoules per mole) | 0 kJ/mol (kilojoules per mole) | 13.95 kJ/mol (kilojoules per mole) first ionization energy | 375.7 kJ/mol (kilojoules per mole) | 2372.3 kJ/mol (kilojoules per mole) | 502.9 kJ/mol (kilojoules per mole) ionization energies | 375.7 kJ/mol | 2234.3 kJ/mol | 3400 kJ/mol | 2372.3 kJ/mol | 5250.5 kJ/mol | 502.9 kJ/mol | 965.2 kJ/mol | 3600 kJ/mol
| cesium | helium | barium valence | 1 | 0 | 2 electronegativity | 0.79 | | 0.89 electron affinity | 45.5 kJ/mol (kilojoules per mole) | 0 kJ/mol (kilojoules per mole) | 13.95 kJ/mol (kilojoules per mole) first ionization energy | 375.7 kJ/mol (kilojoules per mole) | 2372.3 kJ/mol (kilojoules per mole) | 502.9 kJ/mol (kilojoules per mole) ionization energies | 375.7 kJ/mol | 2234.3 kJ/mol | 3400 kJ/mol | 2372.3 kJ/mol | 5250.5 kJ/mol | 502.9 kJ/mol | 965.2 kJ/mol | 3600 kJ/mol
Reactivity
Reactivity

Atomic properties

| cesium | helium | barium term symbol | ^2S_(1/2) | ^1S_0 | ^1S_0 atomic radius | 260 pm | 31 pm | 215 pm covalent radius | 244 pm | 28 pm | 215 pm van der Waals radius | | 140 pm | (unknown) (electronic ground state properties)
| cesium | helium | barium term symbol | ^2S_(1/2) | ^1S_0 | ^1S_0 atomic radius | 260 pm | 31 pm | 215 pm covalent radius | 244 pm | 28 pm | 215 pm van der Waals radius | | 140 pm | (unknown) (electronic ground state properties)

Abundances

| cesium | helium | barium universe abundance | 8×10^-8 mass% | 23 mass% | 1×10^-6 mass% solar abundance | 8×10^-7 mass% | 23 mass% | 1×10^-6 mass% meteorite abundance | 1.4×10^-5 mass% | | 2.7×10^-4 mass% crust abundance | 1.9×10^-4 mass% | 5.5×10^-7 mass% | 0.034 mass% ocean abundance | 5×10^-8 mass% | 7.2×10^-10 mass% | 3×10^-6 mass% human abundance | 2×10^-6 mass% | | 3×10^-5 mass% universe molar abundance | 1×10^-9 mol% | 7.2 mol% | 9×10^-9 mol% solar molar abundance | 7×10^-9 mol% | 7.4 mol% | 9.9×10^-9 mol% meteorite molar abundance | 2×10^-6 mol% | | 4.1×10^-5 mol% ocean molar abundance | 2.3×10^-9 mol% | 1.1×10^-9 mol% | 1.4×10^-7 mol% crust molar abundance | 2.9×10^-5 mol% | 3×10^-6 mol% | 0.0051 mol% human molar abundance | 1×10^-7 mol% | | 1.4×10^-6 mol%
| cesium | helium | barium universe abundance | 8×10^-8 mass% | 23 mass% | 1×10^-6 mass% solar abundance | 8×10^-7 mass% | 23 mass% | 1×10^-6 mass% meteorite abundance | 1.4×10^-5 mass% | | 2.7×10^-4 mass% crust abundance | 1.9×10^-4 mass% | 5.5×10^-7 mass% | 0.034 mass% ocean abundance | 5×10^-8 mass% | 7.2×10^-10 mass% | 3×10^-6 mass% human abundance | 2×10^-6 mass% | | 3×10^-5 mass% universe molar abundance | 1×10^-9 mol% | 7.2 mol% | 9×10^-9 mol% solar molar abundance | 7×10^-9 mol% | 7.4 mol% | 9.9×10^-9 mol% meteorite molar abundance | 2×10^-6 mol% | | 4.1×10^-5 mol% ocean molar abundance | 2.3×10^-9 mol% | 1.1×10^-9 mol% | 1.4×10^-7 mol% crust molar abundance | 2.9×10^-5 mol% | 3×10^-6 mol% | 0.0051 mol% human molar abundance | 1×10^-7 mol% | | 1.4×10^-6 mol%

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