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calcium vs potassium vs curium

Input interpretation

calcium (chemical element) | potassium (chemical element) | curium (chemical element)
calcium (chemical element) | potassium (chemical element) | curium (chemical element)

Periodic table location

Periodic table location
Periodic table location

Images

Images
Images

Basic elemental properties

| calcium | potassium | curium atomic symbol | Ca | K | Cm atomic number | 20 | 19 | 96 short electronic configuration | [Ar]4s^2 | [Ar]4s^1 | [Rn]7s^25f^76d^1 Aufbau diagram | 4s | 4s | 6d 5f 7s block | s | s | f group | 2 | 1 | period | 4 | 4 | 7 atomic mass | 40.078 u | 39.0983 u | 247 u half-life | (stable) | (stable) | 15.6 Myr
| calcium | potassium | curium atomic symbol | Ca | K | Cm atomic number | 20 | 19 | 96 short electronic configuration | [Ar]4s^2 | [Ar]4s^1 | [Rn]7s^25f^76d^1 Aufbau diagram | 4s | 4s | 6d 5f 7s block | s | s | f group | 2 | 1 | period | 4 | 4 | 7 atomic mass | 40.078 u | 39.0983 u | 247 u half-life | (stable) | (stable) | 15.6 Myr

Thermodynamic properties

| calcium | potassium | curium phase at STP | solid | solid | solid melting point | 842 °C | 63.38 °C | 1345 °C boiling point | 1484 °C | 759 °C | 3110 °C critical temperature | | 2223 K | (unknown) critical pressure | | 16 MPa | (unknown) molar heat of fusion | 8.54 kJ/mol | 2.33 kJ/mol | (unknown) molar heat of vaporization | 155 kJ/mol | 76.9 kJ/mol | (unknown) specific heat at STP | 631 J/(kg K) | 757 J/(kg K) | (properties at standard conditions)
| calcium | potassium | curium phase at STP | solid | solid | solid melting point | 842 °C | 63.38 °C | 1345 °C boiling point | 1484 °C | 759 °C | 3110 °C critical temperature | | 2223 K | (unknown) critical pressure | | 16 MPa | (unknown) molar heat of fusion | 8.54 kJ/mol | 2.33 kJ/mol | (unknown) molar heat of vaporization | 155 kJ/mol | 76.9 kJ/mol | (unknown) specific heat at STP | 631 J/(kg K) | 757 J/(kg K) | (properties at standard conditions)

Material properties

| calcium | potassium | curium density | 1.55 g/cm^3 | 0.856 g/cm^3 | 13.51 g/cm^3 liquid density | 1.378 g/cm^3 | 0.828 g/cm^3 | (unknown) molar volume | 25.86 cm^3/mol | 45.7 cm^3/mol | 18.3 cm^3/mol Mohs hardness | 1.75 (between gypsum and talc) | 0.4 (between talc and gypsum) | (unknown) Brinell hardness | 167 MPa | 0.363 MPa | (unknown) bulk modulus | 17 GPa | 3.1 GPa | (unknown) shear modulus | 7.4 GPa | 1.3 GPa | (unknown) Young's modulus | 20 GPa | | (unknown) Poisson ratio | 0.31 | | (unknown) sound speed | 3810 m/s | 2000 m/s | (unknown) thermal expansion | 2.23×10^-5 K^(-1) | | (unknown) thermal conductivity | 200 W/(m K) | 100 W/(m K) | (unknown) (properties at standard conditions)
| calcium | potassium | curium density | 1.55 g/cm^3 | 0.856 g/cm^3 | 13.51 g/cm^3 liquid density | 1.378 g/cm^3 | 0.828 g/cm^3 | (unknown) molar volume | 25.86 cm^3/mol | 45.7 cm^3/mol | 18.3 cm^3/mol Mohs hardness | 1.75 (between gypsum and talc) | 0.4 (between talc and gypsum) | (unknown) Brinell hardness | 167 MPa | 0.363 MPa | (unknown) bulk modulus | 17 GPa | 3.1 GPa | (unknown) shear modulus | 7.4 GPa | 1.3 GPa | (unknown) Young's modulus | 20 GPa | | (unknown) Poisson ratio | 0.31 | | (unknown) sound speed | 3810 m/s | 2000 m/s | (unknown) thermal expansion | 2.23×10^-5 K^(-1) | | (unknown) thermal conductivity | 200 W/(m K) | 100 W/(m K) | (unknown) (properties at standard conditions)

Electromagnetic properties

| calcium | potassium | curium electrical type | conductor | conductor | resistivity | 3.4×10^-8 Ω m (ohm meters) | 7×10^-8 Ω m (ohm meters) | (unknown) electrical conductivity | 2.9×10^7 S/m (siemens per meter) | 1.4×10^7 S/m (siemens per meter) | (unknown) magnetic type | paramagnetic | paramagnetic | (unknown) volume magnetic susceptibility | 2.139×10^-5 | 5.74×10^-6 | mass magnetic susceptibility | 1.38×10^-8 m^3/kg (cubic meters per kilogram) | 6.7×10^-9 m^3/kg (cubic meters per kilogram) | molar magnetic susceptibility | 5.531×10^-10 m^3/mol (cubic meters per mole) | 2.62×10^-10 m^3/mol (cubic meters per mole) | work function | 2.87 eV (Polycrystalline) | 2.29 eV (Polycrystalline) | threshold frequency | 6.94×10^14 Hz (hertz) | 5.537×10^14 Hz (hertz) | color | (silver) | (silver) | (silver)
| calcium | potassium | curium electrical type | conductor | conductor | resistivity | 3.4×10^-8 Ω m (ohm meters) | 7×10^-8 Ω m (ohm meters) | (unknown) electrical conductivity | 2.9×10^7 S/m (siemens per meter) | 1.4×10^7 S/m (siemens per meter) | (unknown) magnetic type | paramagnetic | paramagnetic | (unknown) volume magnetic susceptibility | 2.139×10^-5 | 5.74×10^-6 | mass magnetic susceptibility | 1.38×10^-8 m^3/kg (cubic meters per kilogram) | 6.7×10^-9 m^3/kg (cubic meters per kilogram) | molar magnetic susceptibility | 5.531×10^-10 m^3/mol (cubic meters per mole) | 2.62×10^-10 m^3/mol (cubic meters per mole) | work function | 2.87 eV (Polycrystalline) | 2.29 eV (Polycrystalline) | threshold frequency | 6.94×10^14 Hz (hertz) | 5.537×10^14 Hz (hertz) | color | (silver) | (silver) | (silver)

Reactivity

| calcium | potassium | curium valence | 2 | 1 | 4 electronegativity | 1 | 0.82 | 1.3 electron affinity | 2.37 kJ/mol (kilojoules per mole) | 48.4 kJ/mol (kilojoules per mole) | (unknown) first ionization energy | 589.8 kJ/mol (kilojoules per mole) | 418.8 kJ/mol (kilojoules per mole) | 581 kJ/mol (kilojoules per mole) ionization energies | 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 | 418.8 kJ/mol | 3052 kJ/mol | 4420 kJ/mol | 5877 kJ/mol | 7975 kJ/mol | 9590 kJ/mol | 11343 kJ/mol | 14944 kJ/mol | 16963.7 kJ/mol | 48610 kJ/mol | 581 kJ/mol
| calcium | potassium | curium valence | 2 | 1 | 4 electronegativity | 1 | 0.82 | 1.3 electron affinity | 2.37 kJ/mol (kilojoules per mole) | 48.4 kJ/mol (kilojoules per mole) | (unknown) first ionization energy | 589.8 kJ/mol (kilojoules per mole) | 418.8 kJ/mol (kilojoules per mole) | 581 kJ/mol (kilojoules per mole) ionization energies | 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 | 418.8 kJ/mol | 3052 kJ/mol | 4420 kJ/mol | 5877 kJ/mol | 7975 kJ/mol | 9590 kJ/mol | 11343 kJ/mol | 14944 kJ/mol | 16963.7 kJ/mol | 48610 kJ/mol | 581 kJ/mol
Reactivity
Reactivity

Atomic properties

| calcium | potassium | curium term symbol | ^1S_0 | ^2S_(1/2) | ^9D_2 atomic radius | 180 pm | 220 pm | covalent radius | 176 pm | 203 pm | 169 pm van der Waals radius | | 275 pm | (unknown) (electronic ground state properties)
| calcium | potassium | curium term symbol | ^1S_0 | ^2S_(1/2) | ^9D_2 atomic radius | 180 pm | 220 pm | covalent radius | 176 pm | 203 pm | 169 pm van der Waals radius | | 275 pm | (unknown) (electronic ground state properties)

Abundances

| calcium | potassium | curium universe abundance | 0.007 mass% | 3×10^-4 mass% | solar abundance | 0.007 mass% | 4×10^-4 mass% | 0 mass% meteorite abundance | 1.1 mass% | 0.07 mass% | 0 mass% crust abundance | 5 mass% | 1.5 mass% | 0 mass% ocean abundance | 4.2×10^-4 mass% | 0.042 mass% | 0 mass% human abundance | 1.4 mass% | 0.2 mass% | 0 mass% universe molar abundance | 2×10^-4 mol% | 1×10^-5 mol% | solar molar abundance | 2×10^-4 mol% | 9.9×10^-6 mol% | 0 mol% meteorite molar abundance | 0.52 mol% | 0.037 mol% | 0 mol% ocean molar abundance | 6.5×10^-5 mol% | 0.0066 mol% | 0 mol% crust molar abundance | 2.6 mol% | 0.78 mol% | 0 mol% human molar abundance | 0.22 mol% | 0.032 mol% | 0 mol%
| calcium | potassium | curium universe abundance | 0.007 mass% | 3×10^-4 mass% | solar abundance | 0.007 mass% | 4×10^-4 mass% | 0 mass% meteorite abundance | 1.1 mass% | 0.07 mass% | 0 mass% crust abundance | 5 mass% | 1.5 mass% | 0 mass% ocean abundance | 4.2×10^-4 mass% | 0.042 mass% | 0 mass% human abundance | 1.4 mass% | 0.2 mass% | 0 mass% universe molar abundance | 2×10^-4 mol% | 1×10^-5 mol% | solar molar abundance | 2×10^-4 mol% | 9.9×10^-6 mol% | 0 mol% meteorite molar abundance | 0.52 mol% | 0.037 mol% | 0 mol% ocean molar abundance | 6.5×10^-5 mol% | 0.0066 mol% | 0 mol% crust molar abundance | 2.6 mol% | 0.78 mol% | 0 mol% human molar abundance | 0.22 mol% | 0.032 mol% | 0 mol%

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