element types of potassium fluoride

potassium fluoride | element types

fluorine | potassium

Periodic table location

Images

| fluorine | potassium atomic symbol | F | K atomic number | 9 | 19 short electronic configuration | [He]2s^22p^5 | [Ar]4s^1 Aufbau diagram | 2p 2s | 4s block | p | s group | 17 | 1 period | 2 | 4 atomic mass | 18.998403163 u | 39.0983 u half-life | (stable) | (stable)

| fluorine | potassium phase at STP | gas | solid melting point | -219.6 °C | 63.38 °C boiling point | -188.12 °C | 759 °C critical temperature | 144.13 K | 2223 K critical pressure | 5.172 MPa | 16 MPa molar heat of fusion | 0.26 kJ/mol | 2.33 kJ/mol molar heat of vaporization | 3.27 kJ/mol | 76.9 kJ/mol specific heat at STP | 824 J/(kg K) | 757 J/(kg K) adiabatic index | 7/5 | (properties at standard conditions)

| fluorine | potassium density | 0.001696 g/cm^3 | 0.856 g/cm^3 liquid density | | 0.828 g/cm^3 molar volume | 11200 cm^3/mol | 45.7 cm^3/mol Mohs hardness | | 0.4 (between talc and gypsum) Brinell hardness | | 0.363 MPa bulk modulus | | 3.1 GPa shear modulus | | 1.3 GPa refractive index | 1.000195 | sound speed | | 2000 m/s thermal conductivity | 0.0277 W/(m K) | 100 W/(m K) (properties at standard conditions)

| fluorine | potassium electrical type | | conductor resistivity | | 7×10^-8 Ω m (ohm meters) electrical conductivity | | 1.4×10^7 S/m (siemens per meter) magnetic type | | paramagnetic volume magnetic susceptibility | | 5.74×10^-6 mass magnetic susceptibility | | 6.7×10^-9 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | | 2.62×10^-10 m^3/mol (cubic meters per mole) work function | | 2.29 eV (Polycrystalline) threshold frequency | | 5.537×10^14 Hz (hertz) color | (colorless) | (silver) refractive index | 1.000195 |

| fluorine | potassium valence | 1 | 1 electronegativity | 3.98 | 0.82 electron affinity | 328 kJ/mol (kilojoules per mole) | 48.4 kJ/mol (kilojoules per mole) first ionization energy | 1681 kJ/mol (kilojoules per mole) | 418.8 kJ/mol (kilojoules per mole) ionization energies | 1681 kJ/mol | 3374.2 kJ/mol | 6050.4 kJ/mol | 8407.7 kJ/mol | 11022.7 kJ/mol | 15164.1 kJ/mol | 17868 kJ/mol | 92038.1 kJ/mol | 106434.3 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

Reactivity

| fluorine | potassium term symbol | ^2P_(3/2) | ^2S_(1/2) atomic radius | 50 pm | 220 pm covalent radius | 57 pm | 203 pm van der Waals radius | 147 pm | 275 pm (electronic ground state properties)

| fluorine | potassium universe abundance | 4×10^-5 mass% | 3×10^-4 mass% solar abundance | 5×10^-5 mass% | 4×10^-4 mass% meteorite abundance | 0.0087 mass% | 0.07 mass% crust abundance | 0.054 mass% | 1.5 mass% ocean abundance | 1.3×10^-4 mass% | 0.042 mass% human abundance | 0.0037 mass% | 0.2 mass% universe molar abundance | 3×10^-6 mol% | 1×10^-5 mol% solar molar abundance | 3×10^-6 mol% | 9.9×10^-6 mol% meteorite molar abundance | 0.0097 mol% | 0.037 mol% ocean molar abundance | 4.2×10^-5 mol% | 0.0066 mol% crust molar abundance | 0.059 mol% | 0.78 mol% human molar abundance | 0.0012 mol% | 0.032 mol%

| fluorine | potassium half-life | (stable) | (stable) stable isotopes | F-19 (100%) | K-39 (93.2581%) | K-41 (6.7302%) nuclear spin | F-14: 2^- | F-15: 1/2^+ | F-16: 0^- | F-17: 5/2^+ | F-18: 1^+ | F-19: 1/2^+ | F-20: 2^+ | F-21: 5/2^+ | F-22: 4^+ | F-23: 5/2^+ | F-25: 5/2^+ | F-26: 1^+ | F-27: 5/2^+ | F-29: 5/2^+ | F-31: 5/2^+ | K-32: 1^+ | K-33: 3/2^+ | K-34: 1^+ | K-35: 3/2^+ | K-36: 2^+ | K-37: 3/2^+ | K-38: 3^+ | K-39: 3/2^+ | K-40: 4^- | K-41: 3/2^+ | K-42: 2^- | K-43: 3/2^+ | K-44: 2^- | K-45: 3/2^+ | K-46: 2^- | K-47: 1/2^+ | K-48: 2^- | K-49: 3/2^+ | K-52: 2^- | K-53: 3/2^+ | K-54: 2^- | K-55: 3/2^+ unstable isotopes | F-18 (109.771 min) | F-17 (64.49 s) | F-20 (11.07 s) | F-22 (4.23 s) | F-21 (4.158 s) | F-23 (2.23 s) | F-24 (390 ms) | F-25 (50 ms) | F-26 (9.6 ms) | F-27 (5 ms) | F-29 (2.5 ms) | F-30 (260 ns) | F-31 (250 ns) | F-28 (40 ns) | F-16 (11 zs) | F-15 (0.46 zs) | K-40 (1.248 Gyr) | K-43 (22.3 h) | K-42 (12.321 h) | K-44 (22.13 min) | K-45 (17.81 min) | K-38 (7.637 min) | K-46 (105 s) | K-47 (17.5 s) | K-48 (6.8 s) | K-49 (1.26 s) | K-37 (1.226 s) | K-50 (472 ms) | K-51 (365 ms) | K-36 (342 ms) | K-35 (178 ms) | K-52 (105 ms) | K-53 (30 ms) | K-54 (10 ms) | K-55 (3 ms) | K-34 (25 ns) | K-33 (25 ns) neutron cross-section | 0.0096 b | 2.1 b neutron mass absorption | 2×10^-5 m^2/kg | 0.0018 m^2/kg

| fluorine | potassium CAS number | 7782-41-4 | 7440-09-7 PubChem CID number | 24524 | 5462222 Gmelin number | 16281 |